Outdoors often taste better, producing bigger, more dense buds. However, if you havent got a good spot they will often get nicked - so remember to take a little bud every now and then if youre concerned. Also, if its a big outdoor grow, the police will sometimes monitor the location so they can identify the grower, leading to a large fine and/or a jail sentence. Outdoor plants also take longer to flower; planting in April/May and harvesting in September/October is the norm.