Well I have the 45's of Modern Cool, Companion and Nightclub. Keeping the musical selections of each album out of the equation I would rate them sonically
1. Nightclub ( by quite a margin IMHO)
2. Companion
3. Modern Cool
I agree with sonofjim that Modern Cool is disappointing but add that the 33 1/3 offering of "A fortnight in France" is well worth getting - excellent in every way!
As you may have guessed I am a Patricia Barber fan.