I've spent some time drawing pictures to understand location and language of how to correctly identify the O2 sensors, and I think I understand now. Both of the "downstream" sensors, near the "Y" split (after the pre-cats) - would be the Bosch 13201 sensors? Both of the sensors near the top of the engine or "upstream" sensors (before the pre-cats) - would then be Bosch 13115? In other words, on Bank 1 there would be a 13115 near the top of the engine and a 13201 underneath the engine? And the same for Bank 2?
You can be Phil too if you'd like. 
