Lady and the Tramp vs. Oliver + Company
There are quite a few similarities between the characters in the two films, most notably Tramp and Dodger. Even Pedro and Bull resemble Tito and Francis, respectively. Jock, Peg and Trusty (as well as Pongo from "101 Dalmatians") all show up in cameo roles in "Oliver".
However, I prefer this 1955 classic to the 1988 modern mess. It was an interesting idea to do Dickens in New York City with dogs and cats, but this is still a classic from the '50's that I've grown quite attached to lately, much like "The Rescuers" (1977). (Incidentally both "Lady and the Tramp" AND "The Rescuers" seem to share a release date: June 22; 22 years apart, of course.)