Hi Evan!
I own the B100 SST now and also have owned the Plinus 8150i and 8100. I am not speaking for the 9200. The Plinius presentation is quite different in that it's more laid back and a bit slower sounding for lack of a better term. It is more euphoric if you will but does miss detail to some degree IMO. I'd say from the units I have owned, they sound a bit less realistic but nonetheless quite good. Soundstaging appears wider but it is also less direct so that could influence perception. I haven't heard the 9200 yet.
The B100 is the best integrated I have owned or heard. It has an very clear, upfront, transparent character that resolves a lot of detail but I would also say it is quite balanced and nuetral. The top end is open, extended and clear, but if a speakers mids aren't as transparent someone may incorrectly state it is bright. It can actually have a warmth to it's overall presentation depending on source and speakers of course. Bass is very tight and quick. The center fill soundstage is fantastic. Drums have excellent speed and impact. The Plinius by comparison mutes drum impacts a bit. I currently have the 8100 and have done A/B comparisions. I also have a newer model B60 and the B100 is a clear improvement across the range.
As always. Listen for yourself as we all have different taste.
Ron
