If you are talking about pumps and filters, mostly it comes down to capacity. I don't much about AG filters and pumps, but I do know that IG filters and pumps can be used with AG pools.
If you are taling about SWCGs, then many AG pool companies will void the warranty, others won't, and even sell their own units. Again, it comes down to capacity.
My pool is technically an AG but functions more like an IG and I use an IG pump, filter and SWCG.