I have these 2 sets of wheels to allocate to bikes. Wondering if one is better than the other; to me they seem pretty evenly matched. They are both 6/7 speed. One set is going to get bumped to 8 speed and go on our tandem; the other set will go on a single speed. They are both in pretty nice shape with not much brake wear.

First up: Deore LX M560 hubs laced to Specialized X23 rims. No eyelets, heat treated, stainless spokes.

Next: Deore LX M550 hubs laced to Matrix Single Track rims. Again, no eyelets, heat treated, stainless spokes.

The wheels came from an early '90s Rockhopper Comp and an early '90s Trek 950 Singletrack, respectively. As far as I know they were original equipment, but I'm not certain.

Any strong opinions as to relative quality?