SME V tonearm versus Rega tonearms on Michell Orbe

Does anyone have experience comparing the SME V tonearm on a Michell Orbe turntable with a Rega arm, either a stock Rega RB 900, RB 600, RB 300 or RB 250, or a modified Rega arm (e.g. Origin Live RB250)? I am interested in using either a Benz Micro Ruby 2 or Koetsu Urushi as the cartridge. If you can give advice regarding sound or set up capabilities, that would be most appreciated.

Scott