940nm wavelength laser is superior for treating facial spider veins (telangiectasias) as compared to the 532nm wavelength laser

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"According to the researchers, while both the 532 and 940nm wavelength lasers are effective for facial telangiectasias, they lacked evidence to support whether one wavelength was superior to the other until now.....Given the efficacy and safety of the 940nm wavelength laser, the researchers recommend this wavelength be added to the standard treatment facial vasculature."

Better Laser For Treating Facial Spider Veins Identified By BUSM Researchers, Medical News Today

Apparently the Cadillac of these type laser machines is the V+ laser