It’s Maemo 5 will only be used OS on high-end  type Nokia .Maemo speed has several features, among others Maemo Browser has a fast browser with a Mozilla browser with video and animation quality is good and supported with  Adoba Flash 9.4. Maemo can multitasking the same with Windows Mobile. And Maemo have been able to integrate with a variety of web communication such as Ovi, Gtalk, Skype and others .Maemo also has other features similar to the Windows Mobile such as Copy & Paste functionality between applications.
Is Maemo 5 will be better than Windows Mobile and Symbian? We believe should be better than the Symbian and Windows Mobile because it offers a feature in Windows Mobile but Maemo OS will not burden the processor and memory work in Nokia N900.