As someone that actually develops for both...
Android devices are better in almost every way possible -if- you are sure you get the devices that are comparable in spec to the corresponding Apple device. It's the same when it comes to PCs vs. Macs; with you easily spending ~500 less for a ocmparable PC to Mac.
Androids have the "you can put anything on them via USB" advantage (without hacking an Applie product) that is HUGE, especially since it's useful as a last second storage/transfer device as well. For instance, on job interviews, I sync demo reels and audio with my PC and Tablets without having to go through iTunes or hack into the iPad.
However, for the layman that just wants to buy stuff via a central store and not even bother plugging into a USB port, and whose eyes cross when they see al lthe android tablets available, not knowing the spec differences, they typically do better with the "simple" choice of just buying an iPad.