I don't have any experience with the two models mentioned, however I'm using a pair of Vincent SP-997 mono power amps and I can tell you that everything about them indicates it's a quality product. They are small but heavy and very well built. Sound is excellent. Very clean and uncolored.
What I'm trying to say is that I would not hesitate buying a Vincent-product if I was you, just because it's made in China.
A lot of stuff is made in China these days and as long as the quality control is good enough (and worker health and welfare is taken care of, but that's a different story) I don't see a problem.
Best,
Henrik