Well in your last thread you asked for opinions on deep sounding slip ons. You weren't specific about brands or anything, you just said you were thinking about Yosh. Seems to me you got a lot of responses about different deep sounding systems, including what to look for in a deep sounding system.
If you're considering specifically an R-22 vs an RS-3 slipons that's a different story....not exactly what you asked last time.
I for one cannot vouch for either Yosh, I am sure people will chime in soon. Good luck.