Not a stupid question, but why don't you just flick the switch and find out? It may depend on the manner in which the mono signal was transferred to the CD. It might cancel out some noise on the CD from the remastering.
Mono recording question...
..just wondering if it makes sense to listen to mono digital recordings in mono just as you would with analog recordings. If this is an incredibly stupid and obvious question my apologies, my preamp has a mono switch and I'm listening to a mono cd of some early Miles Davis in mono while reading Art Dudley's latest column on mono lp's in the new Stereophile. It was this conflux of events that got my little brain twitching. Thanks for taking pity on a poor, confused soul.