There's pros and cons to both systems; it's merely a preference of mine after having a mixture of both Android and webOS devices for a couple of years now.
A lot of people don't know that you can move the cards around so that you can arrange two cards to be right next to each other, if you could speed up your workflow that way. I also don't like how you have to keep the home button pressed pon android, may be it is just my phone, but I would rather have an instant response to pressing home button rather than a timed one.