Talk:Diana/@comment-4888212-20150704165739/@comment-26441222-20150707175739

Nidalee has better sustain, especially now, thanks to no-cost Runeglaive activation. When it comes to smaller skirmishes in the early game, Nidalee can handle more of them. She's more likely to be able to afford better items when she's finally forced back, and she snowballs a bit better.

Diana's shield is a bit bigger than Nidalee's heal, and on a shorter cooldown. More importantly, Nidalee has to switch out of her primary damage-dealing mode to heal (which can be inconvenient unless the fight is already breaking up and she wants to chase), while Diana's shield is also a damage spell. This means that Diana fares better (and is more likely to survive) in larger teamfights. But she'll need to manage her resources better to be ready when the fight starts, and it's much easier to wear her down over the course of one or more fights. She has no real escape (unless you want to chain QR in the jungle and pull aggro), so it's all or nothing for her.

Nidalee works well in poke or pick-oriented team comps, because she's an assassin with stronger, longer-range, single-target poke, and traps for vision to catch roaming enemies even in the gaps between your wards. If you step on her traps, she can spear you from over the wall and then maul your face before your team has a chance to react (or jump on you right away if you're already low). She can pounce AWAY even if your team does come to the rescue, and be at full health the next time you see her.

Diana works well in a hard engage team comp, where she can be on the front line, doubling up on whatever initiator CC her team landed and dishing out lots of AoE damage, easily slipping into the enemy backline because she's firing her Qs almost point blank. Diana is a bruiser who happens to have a lot of burst, and her net durability at any time is deceptively high thanks to her on-demand shield.

TL;DR: Nidalee is a pokey mobile assassin with great sustain and vision. Diana is an all-in bruiser who thrives in teamfights.