RWTD

Depends on your objectives(how you define better)as well as muscle fiber type and other factors but for overall fitness some of both would probably work best.Personally I lift weights for my intense training with an objective to build muscle size and strength and find weights more effective than intense cycling for this objective.As I have a fast metabolism and a relatively hard time adding muscle I do the cycling at a less intense pace to actually try to keep my metabolism under control so I can just lose fat while sparing muscle loss from the cycling.This way overall I get anaerobic and aerobic fitness benefits plus am able to add muscle while reducing bodyfat.It works for me.So your question is not really easy to answer without taking into account bodytype/metabolism/muscle fiber type/other training/individual objectives etc.