[NEWBIE] Are more watts better?

I'm soon going to buy my first electric guitar and found 2 budget practice amps I'm interested in. One is the Leem S10G and the other the Marshall MS-2 mini amp. They're both about the same price but the Leem has 10W while the Marshall has 2W. I don't know how much a watt is really and if 10 is overkill, but at the same time there's almost no price difference. Shouls I just get the Leem?