I think you used 195/50R15, right? If yes, they are more than 3.27% smaller.I need 55 profile. If I have to go down to 50, I might as well spent a bit more to get 205/45/16. Stiffer and won't affect my ride height. 50 profile on my car looks too small la. Used to use 50.
RE002 I haven't really explored but S-drive doesn't have 55 profile. Not in my area here anyway. Which is kinda weird and are you sure S-drive is hard sidewall?
This is 205/50R15 which is 1.6% smaller only.
The stiffer sidewall ones are the extreme tyres AD-08, RSR & NT-01
RE-002 and S-Drive harder then your soft C-Drives, but not as stiff as the extreme ones, that is why I mention more for daily use...