Differences in sound Esoteric SA-10, SZ-1,SA60?

Looking at replacing my venerable TEAC VRDS-20 and I’m interested in the Esoteric SZ-1. Having had a short listen to the SA-10, I would like to know if the SZ-1 is closer to the SA-10 or SA60.
I’m aware they all use the same chip and transport.
The Bryston BCD-1 is also on my short list.
I’m a little sceptical on the improvement of CD playback having tried some outboard DAC’s such as the Benchmark DAC-1 and found absolutely no improvements over the VRDS-20 when either used as a transport or as a stand-alone player.
I know a lot of you will bring up other players but I’m trying to narrow my decision.
Associated equipment , Bryston BP25, Bryston 4BSST, Velodyne SP1500R, Dynaudio Contour’s 1.3MKIIs.

Thanks

Robert