I can't give you a review or tell you which is better(if they are both 4.99mW does it matter??). But i think they are both leadlight, which brings me to your options. Why not go to either Chris at WickedLasers or Arnold at AtlasNova. Same thing Alot cheaper, well, i think they are more or less the same. (Though arnorld declares himself not the same cause he doesn't mod his) But same more or less.
Unless you are going to modify it then it really comes down to who has the best warranty to offer. If you are going to mod, then i would consider the customer service, shipping rates.
I just can't justify spending double the money on some thing that is more or less the same product? Or even cheaper on ebay..................