The main reason I bought an iPad was... the musical apps (and the fact you can read ebooks with the Kindle app).
The iPad is a revolution in the musical scene.
Musical apps is something you won't get in the Android Eco-system basically because the OS itself sucks at it(although 4.1 seems to have improved a bit on that side).
With this in mind(musical apps), I will always favor the iPad (mini) over an Android tablet.
That's interesting. I found them largely useless, Lemur and TouchOSC aside (Android has TouchOSC support, though I do keep the iPad around if I want to use Lemur--haven't for a while though), but it's cool to see that they're useful for somebody.
I like Auria, Amplitube,BeatMaker2,iMS20,iSequence,DM1,Animoog,Soundprism and the likes very much.
with audiobus on its way, it is going to get even more interesting.
Been using them for lives & recording demos (iPad+MiC+Jam). the iPad never crashes(not like Android that freezes a lot).
Obviously you do no get a full pc stack and the quality is still not there so I resort to the Mac for more functionality/sound treatment but you can enjoy quite very much if you can't afford the thousands that cost Native Instruments softs or real hardware synths/drum machines.
Care to share?