Ph pros: Very good pp management with a lot of unconditional damage boosts. Has a very user friendly mobbing tool of the rifle.
Ph cons: no survivability, highly reliant on dodging, maximizing damage output and pp management is harder than other classes especially if using the Katana.
Et pros: Very survivable with a very lax style of play (as dps combos but isn't tied to dps rotations nearly as hard as some other classes,) able to support other players just by existing and making use of your weapon actions to block. Also pretty good unconditional damage boosts.
Et cons: Because you're so survivable it's pretty easy to grow complacent and end up dying to being chipped out damage wise. Movement is awkward/different from most and general flow is also very different. Making it hard to transition back and forth between this class and others for non vet players. Only source of significant healing is mate items or the heal skills on Et themselves.
*just my opinion from playing with both for a good period of time now. Don't take as facts.