It's a big week for the Android smartphone world, with the HTC One M8 now on shelves at all four major carriers and the Samsung Galaxy S5 already shipping ahead of its official April 11 debut.

Many consumers may be wondering which of these top-of-the-line phones are right for them — so here's what you need to know:

The Post's Hayley Tsukayama tests out Samsung's new Android smartphone to see how its basic functions, performance and standout features stack up against HTC's One M8 mobile device. Editor's Note: A previous version of this video incorrectly stated that both phones have 2.5 gigahertz processors. (Jhaan Elker/The Washington Post)