Probably lower distortion. SS Freya measures well from what I have seen. Is this the Freya with the tube mode? I’d expect that to sound different than SS or passive.
I have a Freya (no tubes) I’ll be hooking up for first time this weekend. Expecting good things!
Freya with vintage amp will work fine. All depends on personal preference for sound. Personally, I would avoid most vintage gear. Technology has come a long way and best products at all price points which includes Freya reflect that. From a pure technical execution perspective, vintage gear is more likely to be the bottleneck to ultimate performance. Thing is ultimate performance is not the same thing as what people like. People like whatever for whatever reason and that’s perfectly fine. Different strokes…. I remember that vintage Sansui sound quite well. Very nice!