Police Quest III is one example. It supports 2xOPL2, where you will get panning effects. It does not support 4-op OPL3, so stereo OPL2 is basically the best you can do. However, most games that support 2xOPL2 don't support the SB Pro 1.0 without a patch. (Hm, well... most that I cared about, at least. YMMV.) So really, the best option is a PAS. 😉
It's kinda like the SBPro vs. SB16 compatibility argument. I've never run into a game that supports SB Pro in stereo that doesn't natively support SB16, so it's technically true but not very important, IMO. Although TBH I don't remember for sure if Wolf3D might have been one of those cases. I had a PAS 16 between my SB Pro and an AWE32, so I lost stereo support (since the PAS 16 only emulates SB 2.0) until well after I had moved on to Doom and friends anyway.