Difference between SME 3009 VS. RB 300?

Audiogoners,thanks a lot for the information....
Curiously, Jonjacques,what happened with the extensive comparisons?

Dekay, I am working on a design for an "on-the-fly" VTA adjuster for the Rega/OL arms. Should have a prototype up and running soon.

finished (almost) the fully modified td160/sme 3009 table. Comparisions with Rega 25 and Aurum Beta S cartridge show the limitations of the OM 10 super cartridge which is more harsh and slightly diminished soundstage. However, the sme arm is quite beautiful and the mounting plate from Flat Earth Audio allows a relatively quick replacement. The arm can't move back quite enough for perfect alignment, but it is close. Dialing in the sme is still on-going. I just purchased a Wright-Sound phono pre so next week I should be able to take my parasound phono pre to the office for the clash of the AR XA vs. td/160 sme.