What laser is better for removal of nevus sebaceous - CO2 or erbium ?

I had gone through CO2 fractional resurfacing and don't see any visible result in 1 month after it. Instead, the period of redness (erythema) lasted for 3 weeks. Is CO2 really effective when you need to deal with top layers of skin, for example remove nevus. I understand it's more effective for wrinkles and restoring collagen in deeper layers of skin since it has deeper impact (longer wave). But if we want to remove nevus and do it with less number of laser sessions, will Erbium be better ?