Nice job. I like more the second one(especially for the concept). The first one is cool as well but I had problems reading the "N" and the contrast between the thickness of the lines is a little too strong for me.
Definitely the second one, the first is dated and hard to read. I'd either move the icon up a bit to add some tension, a bit like below, or add something to the base to emphasise the 'smash' aspect of the name.