Yes, the 4360 had more, albeit individually smaller, cylinders. It also was not a turbo-compund radial, thus reducing it's complexity. A very cool engine, nonetheless!
Yes, The Udvar-Hazy museum is very good. However, I went there with a fellow pilot, who wasn't an A&P like myself and he wasn't as interested as I to look at everything from Curtiss OX-5 on up like I was. I'll have to do it again sometime.