I have been looking at the two different picosecond lasers (Picosure vs Picoway). One has 755nm/532nm wavelengths, and the other has 1064nm/532nm wavelengths. What do the different numbers mean for a patient (755 vs 1064) and how well the laser will remove their tattoo? I have tattoos of all colours and want the best results possible with the least amount of treatments. And for pulse duration, the lower the ps number the less painful it is?