turbo difference?

I was wondering how you tell the difference between the 14b and the big 16g turbo. cause i have been looking at them and i cant tell by pictures.

the MHI stamped numbers on the compressor cover..I can't remember them off my head

Isnt there also a difference in fins on the compressor wheel? I dont know exactly what it is, I just think I remember read that theres a difference.

Different MHI numbers. Just look at slowboyracing.com.. think they have a a Big 16g pic up close. 16g fins are doubled up I believe and 14b's arent.