I believe Vector will re-flash for free, PCMforless charges $50 a pop for a re-flash, but they are cheaper initially. So if you have all your mods in place and don't think you will need any re-programming later PCMforless can save you some money. As far as which one is better
. I just had mine done by Vector and I'm very happy with the results
Current: '11 Challenger SRT 392, 6spd manual, B+G tune, WE sequential taillights.
Sold: 07 Solstice, black, 5spd manual, convenience, preferred, and premium packages, LSD, Monsoon, XM, A/C, ABS, chrome wheels.
Mods: DDM Stage II SC, Probeam, Race Backbone. Solo SQR-2 catback. Norm's first Solstice rear fascia. JPM center console. DashHawk.