I guess what separates THF and TR for me can be exemplified in a discusion of THF #5 (?) and TR #13.
The hole at THF is the downhill right to left par five with the "tongue" green down in front. While the hole is not offensive until the green, this was one of the wackiest greens I've ever seen. The tongue is about 20 feet wide (this is where the pin was the day I played) and SEVERELY sloped right to left. The bunker to the right is at-grade with the green. Miss left by a few feet, and watch your ball ping anywhere off the rocks. This phenomenon happens quite a bit at THF, where there are rock outcroppings poking out of the grass 3 feet off a green ready to remove any chance of recovery. It is interesting to say the least, but to me, it's just too out there.
#13 at TR is the often-called "unfair" par 5. The hole zig-zags right then left before the blind green set in the circle of sandhills. Personally, this hole isn't unfair. If you miss slightly, your ball will often carom forward or backward onto the green. It is blind, but you can easily walk or drive forward and check the pin location. And, the hole is something like 520, so you should be hitting a short iron!
Circle a green with rock outcroppings, or circle a green with sandhills that block the view to the green...give me the blind green every time.