there are differences.......for example, while indoor light cycles are constant and swich directly to 12/12 outdoor light changes gradually and has overcast days. however, the sunlight is much more intence than any light indoor and has the perfect spectrum...after all, indoor growing is a replica of the plants outdoor needs.

i have heard that outdoor has more teste and odor than the same strain indoor, but i have not tested this theory. although, outdoor crops can be given less refined organic fertilizers ie: fish, worms, manure, or any other foul smelling fertilizers which imo help the plant taste and smell better.