Simply put the 01 feels better to skate around & train with in the yard or on the street & has a more movement.
The R1 feels like a lowered sports car holds corners like your on train tracks & best used on a rink where you need that sort of performance.
The bushing system is a similar concept on both but the R1 uses the top & bottom Part chassis as the base for the rocker limits via inserts.
There is more movement in the O1 then in the R1 with the most rocker insert.
They definitely feel different.