I think if you're moving from ipad to android you won't find all the same apps available on both platforms. As the number of apps available on each platform is now equal, the same is probably true going the other way (I've not seen anything to suggest there are a greater proportion of games on one platform vs another).
Lots of big games are available on Android tablets inc:
Rockstar - Grand Theft Auto 3/VC, Max Payne
EA - Mass Effect Infiltrator, Need for Speed most Wanted,Tiger Woods, Sims 3
Gameloft Catalog - lots of premium racing/fpses, movie tie-ins (I *think* there's some not available on Google play, but looks like most are there now), NOVA 3
Sega - Sonic, Virtua Tennis
Glu Mobile - Call of Duty, Contract Killer
Marvel - Captain America, Avengers Assemble
Other -Bard's Tale, Another World, Shadowgun
there are rumours that Apple have signed exclusivity deals with the likes of EA though (I couldn't find a better source for this than a facebook comment refferring to EA as "Apple's bitch"

; but I would have thought e.g. Infinity Blade's prominence in keynotes means it won't be on Android anytime soon. Conversely Gameloft look to have a deal with Samsung giving exclusivity of some games on the Samsung App store
http://www.droidgamers.com/index.php...sung-galaxy-s4 )