SME 309 vs SME IV - sonic differences?


Hi - I would like to learn from the experts about the sonic differences of this two arms - I have read all the specifications from both of them regarding the bearing tolerances, materials, etc... but... what is the bottom line regarding sonics?

Thanks for sharing your experience, I would like to take a decision for my arm replacement.

Fernando
128x128flg2001
Rccc - I currently own a Dynavector XX2 (Moving coil) - do you beleive it is a good match for either the 309 or an UP4 for my Avid Volvere?
Fernando, I dont have direct experience with that cartridge but it seems it should mate well with the sme. Im sure someone on agon must be running that combo though. post it as a general question.
Rick
Based on my research - I am leaning towards an SME 309 for replacing my RB300 on my Volvere - yes, the iV looks great - but out of my reach if I look for a mint piece.

Morch looks good - but I have found few owners with this combo - looks like the Avid is more in the liking of SME overall.

Origin Live are modified Regas - not sure if I will get the same level of improvement that with the 309.

Gooosshhh - this is hard!!