SS 200 vs RB 20...?

With a load of juggling, & identifying a bunch of stuff to sell, I may very well (& most unexpectedly given my summertime blues...) be finding myself in the position of choosing between an SS 200 (not necessarily fully r&d'd, but with a possible discount if bought before the 31'st of Oct...), or an, as I've been advised by some, the tried & tested RB 20 for the reanimation of my 'town ped' ... Does anyone out there perhaps have some real world experience to help me with this decision? All feedback gratefully received (sadly the Quattrini option is beyond my means...) with many thanx in advance!