The Lester Musketeers films have been favorites of mine since I first saw them in a double-feature 42 1/2 years ago, and I think one is usually more partial to a score if it comes from a film one loves anyway (unless the score is really bad).
Much as I like Schifrin's Musketeers (especially the Athos/Milady theme), I still wish Legrand could have scored it, if only so he could have further developed his material from the first film into the more tragic dimensions the sequel takes.