Originally Posted by
superdex
Better for what?
Do both. But why only 6 miles daily? That's barely a warm up (well, it could be an entire workout of you're doing intervals, but I digress)
Even for interval training, 6 miles would be a short ride. By the time you do a warm-up, 5 minutes between intervals, and a cool-down--you might be going more than 6 miles.
New riders equate bike miles with running or walking miles, so six miles seems like a good workout. Actually, as you know, t's the equivalent of running or walking less than a couple miles.