Hi Rachel,

Ipl and Spl are a different type of medium to Laser.
They use many different wavelengths of light to be attracted to certain things such as pigment, blood vessels and melanin in hair.
Laser uses 1 direct beam to target what its after.

I havent used SPL or know much about it but would assume it is in the same family as IPL.

IPL is good for treating different concerns as it has the many light waves to pick up different things.