Inkjet printers are cheaper, have higher resolution than most lasers, and they seem to have more colors. Neither can print white, nor work very well on light colors using clear decal stock.
Downside of inkjet is that various mfgs use inks that vary in their solubility to clearcoats. I would advise checking vendor's return policy, print a test sheet as soon as you get it, and return it if decals dissolve in clearcoat.
Despite some claims, laser decals DO need a clearcoat, but they do seem more resistant to clearcoats.