Certainly, some artists are better at "saturating" their ink than others. That is probably the difference between your 1st and 2nd tattoo.
Getting healed pictures will be tougher, as most artists never see a good portion of their work again, once it walks out the door.
A healed picture can have a filter applied to it, too.
None of this will assist you in guaranteeing a VIVID tattoo, of course - it just gives you as much info as the rest of us has . . .