It's not the same damage output on pvp?
From what I'm hearing, in Duel Arena stakes especially, the damage output for Legacy is higher than EoC, when it comes to straight up box stakes.
Saw a few threads complaining about this on RSOF. Whether it's true, that I can't tell you.
I'd definitely be weary if I were OP though and staking on worlds where both EoC combat + legacy combat is allowed.
As far as PvM, EoC still seems to get the nod over Legacy xp rates, which was to be expected. Legacy is comparable to a Revolution mode, with slightly less xp.
But yeah dude, I'm hearing boxing EoC vs Legacy, the latter is whooping its ass. Take it with a grain of salt though, it could just be legacy haters trying to cause a stir...but apparently one person said since EoC relies on abilities boxing in EoC is inherently weaker than Legacy.
This could be true, however, cuz I remember trying to kill a guard recently with nothing in EoC, and even that taking a while...a lowly guard lol. So maybe boxing is super weak in EoC and it was something Jagex overlooked.