Hi Peter, no I have not, that is tough to do. I have no SME turntables currently on hand.
I know we all want answers on "What's Best" He He, but it is next to impossible. Looks, serviceability, fav dealers, tonearm options etc also get in the way of what's best.
The SME's are SME's if you know what I mean.
Ian's Kronos Pro/ Black Beauty is my fav for sound.
The AMG is beautiful, sounds beautiful, can have two arms (but only a 9" with an SME mount for the second one)
The Sparta 0.5 is great on its own and can be made even better down the road.
I know said all this before, but really can you go wrong with any of these? Nope.
This is also a public forum and I am dealer, so I have to be politically correct on what I say.
A bit off topic but I can say "What's Best" in phonostages - The Tenor Phono1 is beyond good. Did a comparo the other night against the 3 really well known big time phono pre-amps (one American, German and Swiss) and it was no contest. I think it is the best product they have ever made. The only problem is the waiting list to get one.