[sdiy] Matched transistors and EFM circuits?

[dj hohum]

I just received a couple of PC boards today from EFM, I like them a
lot. Small, clean, well made, fast service.

Anyway, it's well known, or at least often discussed, that one should
match the transistor pairs in a ladder filter. This also holds for
exponential converters. Should I also do this for the various pairs in
the 3526 (korg MS-20 clone)?

In any case, how do the properties of unmatched transistors manifest
themselves in the resulting sound?

Thanks,
Daryl