Casa de Campo may be considered Pete Dye's masterpiece (and one he is/was constantly tinkering with) and I consider it one of the finest courses I've ever played.
That being said, i've only played Doak's Pacific Dunes.
in comparison, I personally think that Dye's ocean holes are better than Doak's, but i also think that he had a better landscape to deal with (picture crystal clear water splashing up onto a green raised 4' above the water surrounding it)--although undoubtedly the soil at PD is better...
All that being said, they are both magical courses and, I think, designers.
I think that Doak's asthetics are more natural, blending with the settings more, but Dye's are gorgeous in and of themselves.
From what I've seen, on both of their "masterpieces", Dye did more with the land he was given (it was pretty crappy pre-golf course)....but dye did better on the routing (PD is genius) and the inland holes are better.
10 rounds, I'd play 7 at Teeth of the Dog, and 3 at PD...but then again, I like warm weather!