Hmm, I've never had regular comply foam subdue bass, just treble from overhang.
For me with the er4s, the t100 series takes the impact out of the bass. Not so much the quantity, but it doesn't sound like it hits as tight and hard. I also get some gentle subduing of treble, even with the foam not overhanging. But it's very hard to be sure, because it could be part the amazing seal brings out the mids more evenly making it seem that way, because I always prefer the "overall" sound of the foam more, but the triple flange seems to bring out the treble air more. So I'm not completely sure. I just know they're different for sure with my ears.
I'd be hesitant to use them on the tenores if they either reduce bass impact or treble, because they are so perfect with silicon when they fit good. But how would you say the s200 compares overall to silicon?