Jay,
I've never seen a Sofue SP 4-10-2 in person, but if it's like my FEF-2, it is not perfect. On the other hand, I have a C&LS 4-10-2 by Henry and consider it to be one of the best models I own, bar none. It's as close to perfect as anything out there and can be had for less than half the price of a Sofue. Admittedly, Sofue locos have a lot of intrinsic value, due to their rarity and his reputation, but my FEF-2 has numerous errors and I've heard his 4-10-2's had some too.
I guess I shouldn't be that critical since it's more a work of art by one man than anything else. But, given the choice to own a Sofue or C&LS 4-10-2, I'll take the C&LS.
Butch