I have a dev account and there are 3 different downloads for iOS 6.1b4, but how do I tell which one for my iPad mini I need to download? I have a 32 GB Wifi only model.
On your iPad go to settings >general> about
Scroll down to model, and match up that model number with one of the 3 listed on the apple dev download page.
Wifi should be a1432 I think.