The CS1x had its companion with the AN1x which is like the SH-201, just less knobs. The CS2x is sample-based; you might be missing those sounds because the 201 can't do 'm.
If you want to get the 201, you'll have to get the CS2x "real life" sounds out of Reason one way or another. It's possible, though (with a nice library and NN-XT or NN-19). The SH201 will mostly act as a better Subtractor (and controller). Since Reason can't record audio, you'll have to do that with ACID.
"Part of an instrument is what it can do, and part of it is what you do to it" - Suzanne Ciani, 197x.