Gsm and cdma hardware difference?

[Stayin100]

I have a CDMA iPhone with a bad digitizer, LCD, and back cover. I won a white set with LCD on eBay for 35 bucks or so. Just to be sure I asked him if it would work on a CDMA phoebe and he said no, its only for the gsm model. So my question is, are there truly differences in the two phones screens?

 

[eddieg]

Yes there is.