Regarding the Sunningdales:
The New has a very interesting evolution. Basically several original Colt holes were abandoned because the members found them to be too hilly. So unfortunately we lost the great, original, 7th. Tom Simpson was called in to replace those holes; which I'm sure pissed Colt off to no end. Simpson's holes were however not popular and Colt/Morrison had the last laugh by replacing these with their own new holes. And luckily we got a world great short par 5: the 6th.
The Old has also been through a ton of changes, most during Colt's tenure as secretary and also when the New was built. The general layout of the course is as Willie Park Jr routed it. Colt however moved and/or totally redesigned the greens of holes: 1,4,5,6,7,8,11,12,13,15,17,18. So I reckon the course is perhaps 50% Colt's. Though it should be stressed that Park's routing is wonderful and gives the course its grand scale that appeals so much (like PV).