Which team would win?

Lucario lvl 62 not EVed
Flygon lvl 75 not EVed
Metagross lvl 75 not EVed
Steelix lvl 73 not EVed
Rapidash lvl 62 not EVed

or

Salamence lvl 70 EVed
Ninjask lvl 50 EVed
Gyarados lvl 50 EVed
Aerodactyl lvl 50 EVed
Empoleon lvl 82 not EVed

2nd

It depends on the IVs and movesets of the Pokemon. But from a glance, I'd say team 2.

team one because its mostly fully evolved pokes and the levels are higher so the stats would be about the same but still team one :p

Both teams are fully evolved. Team 2 would win, but only just, because of the level distance.