CAV and CLV are to me image-wise like 33 1/3 and 45rpm records. You get a higher fidelity with one, but it isn't a deal breaker to have the other.
On ESB I don't know if really any changes were made on the editions throughout the 80's, save for some possible re-equalizing here and there. The 89 era sound should be fine as an alternate. The stereo surround on DJ's V3 as an ac3 track came from an early LD that was not time compressed and is supposedly the theatrical. It's analog sourced as well, probably very similar if not identical to what Silver gave you.
Imagine heading to a small derelict theater in late 1980 and catching a late show of ESB...32 years on. !