ISO 5675 (Ag Couplers) and ISO 7241 Series B are the same body shape only in the 1/2" body size. All other sizes are different.
As far as mixing ball types with poppet types, manufacturers recommend against it. Some end users have done it without a problem, but there is potential for leaking whenever you mix coupler types. These couplers are very inexpensive, so why not just buy a few more pieces and make sure all of your attachments match?