For belts, it looks like they are utilizing Bob's Logistics to get a T4 belt. I do know that all the technologies are different. Science packs have different names, tech names are different, and a lot of items have different names. AAI Loaders is compatible and those are unlocked in a tech generally right after the belts, which makes sense.
I'm using AAI Loaders for now but I do really miss the split lane functionality that this mod provides.