From the Aristocats photos, I'd say the Golden Collection and Special DVDs look most accurate to how I remember and believe the film should appear. The HDTV caps look all kinds of awful and lose detail. The BD restores this but has a paler tone overall and seems to have also smoothed out some detail.
Most of all these Disney classics with multiple aspects should have been preserved in each format. Most of us grew up seeing them in Academy via VHS to boot.
Lady and the Tramp has separate Cinemascope and Academy versions, that were done independently and thus have different animation entirely. In many ways I think the lesser seen Academy is equal to or better than the Scope version. This is only found on the late 90's VHS and LD, but the pressings seem to be hard to identify.
As TAF pointed out, it seems the 1987 CAV of Pinocchio is closest to some grabs of an IB print. The 1993 restored version is likely more how the film was intended to look. I don't think you can really go wrong with either. The BD is an abomination.
I appreciate this listing idea, as I had felt myself wanting to track down some of these. Gosh, I just realized haven't really seen these since I was about 5.