The debate between GB or I vs Bandon, has so far missed the most important factor IMO. Each region in GB&I at least equals Bandon in quality and leaves Bandon in the dust for course choices. Ayr, East Lothian, Fife, the Highlands, Surrey, Kent, Donegal, NI, Sligo & Mayo, SW Ireland all call me back before a return to Bandon
Maybe I don't understand exactly what you mean here by "leaves Bandon in the dust for course choices". Yes, there are way more golf courses in the regions you mention than in Bandon. But there is no way that the top 5-6 courses in most of those regions are BETTER than what you'll get at Bandon. You could certainly make a case for East Lothian, Surrey, NI, and SW Ireland, but to do so, you'll have to take a strong position on the merits of the original course at Bandon that few people were willing to take in that earlier thread.
Now, I love Scotland and England as places to visit; golf courses aside, I would rather travel there any day.
But, I thought this thread was about Wisconsin? I feel like there is much less consensus about the top 5 courses in Wisconsin than there is about the pecking order at Bandon Dunes, but I will use the recent GOLF Magazine top 100 for the matchups:
The Sheep Ranch (97) matched up with Sand Valley (98)
Old Macdonald (77) matched up with Lawsonia (79)
Bandon Dunes (46) is slightly ahead of Whistling Straits (54)
Bandon Trails (40) is significantly ahead of Milwaukee CC (75)
Erin Hills and Mammoth Dunes didn't make the list; I would put either ahead of Milwaukee CC, personally; it would be nice to have a parkland course in the mix, but there are a lot of parkland courses back east I'd take over MCC.
The Lido and Sedge Valley will make the comparison more interesting, but it's still not going to be close unless you think one of the Wisconsin courses can take out Pacific Dunes.