Personal opinion/dads opinion. molle is better for the outdoors fire fights.
How ever in cqb the panel vest is better(given the right panels)
Reasoning molles tend to get heavy. You can always find a good hiding spot in big areas (ie flagriders) to rest a bit and wait for your opponents to get closer.
cqb there is no hiding spots. You need something you can move fast in and isn't going to tire you out or weigh you down.
I say carry both cause I am taking my old mans suggestion, and getting both a panel for indoors a molle for out.