[sdiy] LM394 vs. MAT02 vs. ?

[larry at unicode.com]

I have been looking for LM394's for use in the CGS VCO module and found a
couple of sources at just over $5US each.  I noted from several articles
that the MAT02 might be usable as an alternative, however I've only found a
few at $15US each!  Is there any significant difference between these two
parts?  At there any substitutes that would work just as well but be more
available and cost less?  Should I jump on either of the parts at the
indicated prices?

Larry T.