J4 vs Camille

She can't knockup a whole team, keep multiple people locked in one place, slow multiple people (It's possible but unlikely and difficult), shred through armor, or grant Attack Speed to allies.

camille's ult does no damage on impact, but rather just spreads the team out and puts the auto attack debuff on them.

j4's ult is DUNK TIME

{quoted}

Oh sagacious strategists of the boards hear my question. in what ways is Camille not just a better version of Jarvan IV?

... dood have you seen those thighs? J4 is the real deal. Camille has that metal stuff. Don't even get me started on his abs. The old lady isn't J4

Or did you mean playstyle? J4 has better range and doesn't need a wall to engage, in fact he can go through walls

J4 also gets more free stats and doesn't he buff his allies with his flag as well?

Sagacious Strategist that lurks on the forums here:

J4 shreds some armor, buffing his and his allies' damage. J4 has a MUCH FASTER engage with his EQ than Camille can ever hope to with her wall thing. J4 engage is also much harder to dodge (consequence of the above) J4 doesn't require him to walk away from his target like Cammile's heal, aka Harder to kite J4 creates impassable terrain. You can hold multiple people there. J4 can leave his ult and keep people stuck in it. J4 has a much faster burst. J4 can buff his team with his flag. J4 can actually be played as a Tank, a Bruiser, an Assassin, or even as a Support. He's much more flexible.