 
  Which of the two operating systems  for smart phones more functional, more comfortable, more promising? It  is considered that the future - for Android, and Windows Mobile too old  and has to be forgot. But let's not make hasty conclusions. Let's try to  start to compare these operating systems, giving them an equal chance  to prove themselves.
HTC is as if specially provided us with this opportunity, releasing two communicators with nearly identical hardware equipment, but different OS - HTC  Tattoo with Android and HTC Touch 2 with Windows Mobile 6.5. There is  no better ground for comparison than these two devices. Both smartphones are based on the same integrated platform, Qualcomm MSM7225 processor with a frequency of 528 MHz, equipped with identical amounts of memory, air interfaces, cameras, and even an FM-tuner. 
Well, let's move on to the software capabilities. 
Interface for both devices is actually the same - it's HTC Sense.  However, the differences between versions for Android and Windows Mobile  are really great. Common, in fact, is only the main screen. In Windows  Mobile Sense it is a set of windows which can be browsed through the  horizontal swipes or using icon (icon at the bottom of the screen - a  kind of roots of bookmarks). The composition displayed applets can be  customized; however it is limited to on / off individual tabs. Android  is all about applets, including the objects of the main window - its widgets,  they can be also placed on the seven pages of its interface. Some of  them repeat the design of Sense applets; others are taken directly from  Android. In sum, the shell came out slightly better in Tattoo: flexible  configuration options, more modern graphics and animation. 
As for specific to the OS interface elements themselves, Android is the  leader by a wide margin. Notification bar that stretches on to entire  screen is more convenient than it is in Windows Mobile; HTC even added a  function for it to show in a separate window. Standard application  interface elements are bigger and better placed in Android.
Performance. According to stereotype, Android is faster  than Windows Mobile, especially than WM 6.5. It's not entirely true, as  we saw both systems are working equally fast. In terms of pure speed  experiment both OS's are running virtually at same speed, this also  applies to interface renderer and applications. Programs' launching  speeds depend on their specific implementation under each operating  system, there is no systematic lag in any one of the smartphones.  However, there are two "buts". Windows Mobile has the ability to collect  "bugs" and "brake" during a session (without rebooting). This problem  usually appears after some time, while Android keeps high performance  even at very high and use of system and applications. 
Working with files. The Windows Mobile users and  applications have full freedom of handling files, virtually the same as  in the desktop Windows. File management in Android is a huge problem.  There is no file manager preinstalled. Finding and installing programs  is not difficult, however applications use strict bindings to their work  folders. Many applets can only work with documents in a folder with a  specific name. 
Working with e-mail. Until recently, Windows Mobile has  been setting the bar for functionality, flexibility and compatibility,  but Android is setting new standards in working with e-mail. It's not  just a normal Gmail client, which allows the most convenient way for the  mobile device display and manage correspondence, and work with related services, Google (Calendar, Contacts), but also in the implementation of other protocols. In HTC Tattoo supports POP3/SMTP, and Microsoft  Exchange. Android works more stable and is better when different  encodings in the body of letters. But it has problems with file  attachments. If your mail client is set to save files to SD, it won't  save files at all if there is no SD card.  There appears the same problem with file management (if the mail client  is configured to save them to SD. The second problem is that Tattoo did  not have any preinstalled software to work with Microsoft Office documents. 
Work on the Internet. Android is the leader here. The  HTC Touch 2 has Opera Mobile 9.5, but it is fairly slower than Android  browser. Android browser is faster in rendering pages, better in  compatibility with web design technologies and user-view control.  Android also works better with caching in your browser, which further  enhances the ease of navigating through the pages. 
Telephone communication. There are no dramatic  differences in implementation of telephone applications in Android and  Windows Mobile. At least, this applies to HTC products. Both have a  simple call via interface or the hard button, large keys, direct access  to your address book. In both cases, they used Windows Mobile users  search method by applying a mask of all the letters on entire array of  data. Android features slightly more modern graphics and slightly better  virtual service keys. But here we should not forget that Windows Mobile  is not used only on HTC. Typically, each manufacturer has its own  smartphone, "dialer" and, as a rule, it is somewhat worse than that of  HTC. 
Multimedia. Capabilities of both systems for playback of graphics, audio and video  files are roughly equal, players and viewers are comparable in terms of  functionality and ease of management.  The only problem on Android is  again its file management system. 
 
 As a result, a comparison between two identical devices with different  operating systems breaks the stereotype that Windows Mobile is worse  than Android in all the aspects. In the hands of producers who have  experience with Microsoft and striving to make their devices of  high-quality and attractive for consumers, both OS's running  approximately equal. Android has a much better interface, and it is more  stable under prolonged heavy use, but it has some problems with the  file management. 
Our experience also shows that device manufacturers play a key role in  the development of the operating system and its adaptation to the needs  of the user. Consortia and software companies are more concerned about  the functional expansion of the platform, supported by new technologies  than on particular aspects of its capabilities and comfort of use. As a  result, the general definition of Android as a "crude and unbalanced  equipment", and Windows Mobile - as "unstable and slow". But the  knowledgeable and skilled work of HTC equals them out.