If anybody can tell me please thank you.
Something to also keep in mind is LCD screen quality. Apple's uses an IPS display and IPS is the best LCD panels around. Most other tablets used cheaper panels. One tablet that also uses IPS display is the Asus Transformer. (not related to the robots lol) Insist on getting an IPS panel as it almost feel like you are looking throught a window as is very hard to see any imperfections or pixels.
An iPad is a specific tablet made by Apple. There is the iPad and the iPad 2 both running apples iOS.
btw here is a nice chart on tablets being released this holiday season: http://funadvice.com/r/bn2qnncc3o6
one is windows based the is mac or apple those operating systems