I plan on trying to lighten the other shoe w/ natural sunlight, but maybe there's a better way, as in darkening the floor model safely?
FYI the original color is Chestnut
did you buy them as seconds? or were they not advertised as floor models?
I think there was a post similar to this recently where someone bought AE cordovan seconds and ended up returning them since people told him it would either take too long to darken them by sunlight or it will crack the leather if you expose them to artificial radiation.