Currently--Surly, Jamis, Fuji as well as most other quality steel frames are made by the same company-- Maxway Cycles in Taiwan.

Of course this sort of thing was true in the 80's as well-- there is very little difference in Fuji, Univega, Lotus, Centurion and Miyata bikes. Plus all the Shwinns and Bianchis made in Japan at the same time.