The optics and cool down are identical (assuming both tubes are made out of same material). The GPS version is not manufactured anymore, so you would most likely have to purchase on the used market. On the GPS model, you could also get a fastar compatible tube (I had one), but this is not available on the newer CPC model.
I personally like the look of the older model, but everyone will have their own opinion. I have not tried the newer model but I know the alignment process (sky align) is different.
Hope this helps.
Brock
Craig Weaver said:
Hi all, I'm looking to buy an celestron 11 inch scope. I'm more into visual than ccd stuff right now. I would like to get into ccd eventually (if I can my wife to let me). I'm interested if any one has compared the two types of cats? Have you noticed any cool down difference? Or the optics the same? any help would be appreciated. Thanks Craig