the GSR is a Integra from 94-01 ...I believe 01 is when they quit making them
the Type-r is the "Type-Racing" edition...it sports a more tuned motor,better suspension,sportier interior....
the Type-S refers to the Type-Sport edition of the RSX which replaced the Integra and the Prelude, the Type-S sports a more tuned motor,diff interior, 6-speed gearbox and a few other goodies
www.acura.com can show you all the information you need for the RSX and its tuned version the Type-S ...maybe we'll get the Type-R edition ...ya never know
and the RSX has i-vtec buts thats another post in itself...