Jelco St-250/Audioquest PT6 the exact same?

They look the same but are different.

Most notably the ST-250 is not fluid damped. The PT-6 is (I have one).

They look very much alike but there are differences.

As far as I know, the AQ-6-7-8 Arms were all the same, the only differences were, the Tonearm Cable they threw in with the Arm determined what they were called.

It appears the SA-250ST is the same, but as Delihaus has explained, no damping trough evidently on the SA-250ST.
I would assume both mounting distance, and the Arm Base is identical for both arms.

Another discrepency I noted in some not long back discussions about these arms, is also an apparent different in mass, that the newer SA-250ST seemed to have a higher mass, quite a bit higher that the older AQ Arm? I thought this odd, as they look like virtual clones, and wondered then where this additional mass came from?

Wonder what they did, stuff the ArmWand with a heavier material (lead)? lol

I'm not even sure at this point, if the cueing mechanisms are interchangeable between the Mark AQ PT, and the Jelco 250ST, etc? Mark

I also have an early version of the Jelco 250 here. The "body" looks the same but is different- the 250 is a sealed unit. The bearing housing is different- the Audioquest features a cupped concave dome on top, and possibly an advanced horizontal bearing assembly. I'll need to get back to this.

The arm tube- my guess is perhaps aluminum on the Jelco model and some hybrid alloy for the Audioquest?

The Adioquest is also damped with a rubberized sleeve.

Good to see you here, Mark.