sativa gives you more of a social and uncontrollable laughing high, while indica gives you a stoned high. and you can see the difference in what they look like if you google it.
I prefer pic 1 303053 given you are posting in an indoor thread I would prefer indica over sativa indoors unless you have plenty of room and head height.
Personally I don't like sativa dom buds; I prefer the pinned to the seat, aka couchlock, of the indica.