The nitrogen laser has even a lower wavelength (337nm) so you can likely do more tricks than I could do with the 375nm pointer (that is now dead.

) I definitely recommend the TEA laser build though, very easy.
As for the SSY-1 laser, I've never messed with one but I've used a similar laser. An old camera was literally all I needed to power it, it has a necessary capacitor and trigger to fire the flashlamp. You can always add more capacitors to increase the output too. I have a video on that called "laser taser" I think. That being said, a circuit to fire a SSY1 laser is approaching lethal energies, so don't dive into a project like that without proper reading. Plus the output of that laser can pop your eyeballs in an instant, so wear goggles!
Good luck with the builds!