It's my understanding that the AT853's are designed for balanced use. The R09 is an unbalanced input... so somewhere along the way you have to perform this balanced to unbalanced conversion... whether you really deal with it, or "make it fit" by just wiring it together. I think the transformer inside the AT8533 adapters is the right way to deal with this.
I have AT853's 2 wire with, and without, 4.7k mod, and I have ones with the phantom adapters. I don't have the 3 wire battery box setup. I haven't done AB comps, but I think I like the ones with the phantom adapters best... as far as overall frequency response, but I do use the 2 wire ones for low profile.