the differences are:

sativa / indica

smaller, compact buds / big, donky dick buds
grows in a cooler environment. / grows in hotter environments
more of a trippy, heady high / more of a body high
more of a mission to grow. / not so hard to grow
native to europe / native to india/africa

in a country like america, like here, u prolly get mostly indica, whereas in europe, its mostly sativa.
if u can get sativa, do it.