Wood is better for basments because of rust and wood is more secure. Be sure to place a barier between the cement and wood.also wood is a lot better a sound damping. if you have a bullet gun use it as there is not a lot of difrence (the pros use them). screws just take a lot more time. But a little more secure (use a hammer drill).but concrete scews are ment for forces pulling away from the cement. So there is little atvantage if any. use plenty long nails and if 2x4" are spliting pre drill. Good luck.