Hevishot question

[fish forever]

Remington is sells 3 lines of Hevishot: Turkey, Waterfowl, and upland.

My question is, is there a physical difference between them or is it just marketing? ie. for the same shell, shot size and velocity is there a difference. For example they have:
3" 1.5oz, #4, 1300fps Waterfowl loads -and-
3" 1.5oz, #4, 1300fps Turkey loads
are they the same?

al

[crabbait]

The 20ga Hevishot I just picked up were offered in 3" #6 shot, 1 1/4oz or 1 1/8oz. The lighter load was faster at 1300fps. I think the heavy stuff (Turkey) was 1185fps.

I bought it for pheasant hunting where non-toxic shot is required and went with the lighter, faster load. I would have prefered 2 3/4", 1oz.