Most of the Crucible modes have level advantages "disabled," but I definitely find that there is a huge discrepancy between damage given and taken when doing the same thing against say a 315 when I'm mid 290's. For example, we can both have 1000 Yard Stare and both headshot each other at the same time, but I'd always be one-shotted, while the other guy would almost always be taken down to maybe 20% health. It's the same for other weapons where the only difference I can spot would be the light level. The higher level guardian always seemingly scores one hit or almost instant kills when we are head to head making hits with the same weapon, but it seems like I'm watching their health slowly decrease a small amount while I get annihilated. I would certainly have a skill/reflexes disadvantage against many players, and that's not the game's fault, but it seems like there is more at play than just "git gud-ness." Of course it doesn't help that Bungie thinks an effective loot system would drop hundreds of 265 items from heroics, nightfalls, etc. for a 290's guardian.