Finally Android tablets have caught up to (and even surpassed on some things) the iPad. [Of course iOS vs Android is a big choice.] It's taken just 4 years!

Nexus 10 - clearly better than the iPad on price, display (resolution, size, aspect ratio), sound, Wifi, RAM, GPS. Battery life is unknown though, GPU likely to be worse.

Nexus 7 - beats the iPad Mini on price and resolution, matches on most other things.