No evidence to support such a claim.
While I will acknowledge that there might be some interior changes from ship to ship regardless of class, I think SF builds all of their vessel classes from one set of blueprints.
So essentially speaking, the design itself will be identical when it comes to class.
The only changes you might possibly expect are some interior changes and fine-tuning of power generators (and whatnot).
No eveidence to support such a claim right back atcha, charlie.
What's the width of the GC neck pad where it mates to the saucer?
What are the construction tolerances over that dimension?
Is the Enterprises pad dimension's idential in every way to the Yamato's? Is the Yamato's identical to the Odyssey's? If the dimensions call for a tolerance of +/- 1cm over the full width, the Yamato's pad may be 2cm wider than the Galaxy's, and not fit in the narrower saucer cove.
Are the docking clamp configurations identical across the fleet, or did later builds use an updated configuration, based on experience with earlier builds? Odyssey's 38-clamp configuration wouldn't mate with Galaxy's 32-clamp.
Are all the power conduit mating points the same across the fleet?
Have the ships' engineers tinkered? Made their own improvements?
Was a ship damaged, and had to have their mating pads repaired at a starbase or alien yard where they had to kludge a fix?