If I want to harvest red shallots, I would plant red ones.
If I want to harvest big shallots, I would plant big ones.
Short
answer plant the big ones. then you are a bit more assured of propagating the desired genetics.
Iterations are fine, we don't have to be perfect
My 2nd Location:Florida HardinessZone:10 AHS:10 GDD:8500 Rainfall:2in/mth winter, 8in/mth summer, Soil:Sand pH8 Flat