I have RS NTO in euro. It’s clean osc but it shines with wave multipliers for sines and triangles, and saw with vcfq and other filters. In comparison I only have Moog 901/921 clones they sound different (more full) but I always put them through c3p mixer which get some color.
NTO is really good with animation and where I love Serge modules. Some basic things like cv variable output can add a lot to the sound palette if you put a zadar complex envelope. I have a great bassline with it. Other modulation is also very usable (thanks for built in attenuators/verters.
Previously I have had Furthrrr Gen which was dirtier but also shines with timbre section. What I really want is a RS left part of Donks which consists 2 LPG and Buchla style timbre section. It gives some extra to NTO