It is important to make a distinction between true acne scars and discoloration from acne breakouts. True acne scars will need to be treated with a resurfacing laser (not a pulsed dye laser), or other methods to "fill in" the scar. The pulsed dye laser (Vbeam, etc) is...
If you have not received satisfactory results with IPL treatments, a pulsed-dye laser is a good next step. However, it is also possible the IPL previously used on your face was not powerful enough to produce an optimal outcome. In my practice, we use both the Stellar M22 and the Vbeam Perfecta...
I think that the best laser to treat redness from acne is with the PDL. It also helps improve acne. It will help prevent these areas from forming scars too. There is very little discomfort and downtime. A white mature acne scar is best treated with a resurfacing laser...