spacetogrow, the pods on Purple Plum were not especially large for me but pretty fat with maybe 2-6 fat seeds. I don't remember White Hailstone pods, I think I had a half dozen different radishes growing that year.
But it may be worth trying them if others found them mild... just water a lot and harvest as young as you can.
Thanks for the tips on daikon! I will have to try it.
