Posted By:
Richard L.Peter,
A worthy prewar card question, hope some of the guys give you credit 
According to PSA:
Grove 191 cards graded- 42 of them 6 or higher (includes '34 and '35)
Foxx 241 cards graded- 53 of them 6 or higher
Both sets seem to be equally popular with approximately 12,000 graded for each.
Personally, I find the Grove to be more attractive. I would be curious to know some final prices for each in matching grades?