Differences with these two lasers?

[zargot]

I am doing some research on a DIY add on for my 3d printer for a laser engraver. I do not know much about lasers other than the higher the MW the more powerful the laser. I am currently looking at these two laser modules

http://www.gearbest.com/3d-printer-parts/pp_368053.html

http://www.gearbest.com/3d-printer-parts/pp_501984.html

One is a 5v 1600mw laser and the other is a 12v 500mw. Does the difference in voltage change anything? even though the 1600mw is the higher power laser, does the lower voltage change anything?

Thanks.

[zargot]

Anyone?

[MobyKn]

No big different.Smaller voltage will be higher rated current.All one can be use with 100v or 220v.So that's ok.You need focus on power

[PellLith]

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