Not sure what unit would contain both types, to be honest, so I don't see how that problem would arise.
Anyway, here's my contribution:

The Woodbines are more slender, and maybe a bit shorter, but I would use them on the same table. The figure on the right is sold as a Gurkha, but he has been converted into a Kashmiri (he doesn't look like a Gurkha but he could still be one, as there were lots of them in the Jammu and Kashmir Rifles), and I don't think the bodies of their Indians and Gurkhas are all that different, size-wise.
Edited for spelling mistake.