I owned an SV102A awhile back and currently own an SVX102T (actually #001). In my experience, there was a difference that I could see fairly easily at higher powers such as one would use for planetary observation.
I will note that I did not own these at the same time, but I distinctly recall the Access showing noticeable spherical aberration that hurt contrast at higher power. This is only a sample of one, and some other samples likely are likely better figured. Given that the Access is an imported scope that is not subject to the same optical standard as the current SV scopes, I would expect there to be a wider sample-to-sample variation compared to the SVX line.
The SVX scopes are figured to a very high standard, and I compared mine side-by-side with a Takahashi TSA-102. To my eye, they were very similar optically, both excellent. I liked the focuser and F7 focal ratio of the SVX, which is why I let the TSA-102 go.
Whether the differences between the Access and the SVX are worth $2000 is up to the buyer and how they intend to use the scope. For moderate power I doubt you would see much difference. And mechanically the Access is quite nice with an excellent focuser.
Hope that helps.
Edited by Jeff Bennett, 30 March 2020 - 06:28 PM.