For competitive battling:
* Poliwrath excels in physical attacks and can hit hard with moves like Hydro Pump, Ice Punch, and Earthquake. It's bulky and can take hits, making it a solid mixed attacker.
* Vaporeon is a special attacker with high special defense. It can use powerful moves like Hydro Pump and Surf, and its ability Water Absorb makes it immune to water-type moves.
For casual play or in-game battling:
* Poliwrath is a strong water-fighting type, making it effective against many opponents.
* Vaporeon is a powerful special attacker with a good movepool.
For personal preference:
* Poliwrath has a more "tough" look with its muscular build.
* Vaporeon has a more elegant look with its flowing fins.
To help you decide, tell me:
* What are you using them for? Competitive battling, casual play, or just for fun?
* What is your playstyle? Do you prefer physical or special attacks?
* What other Pokemon are you using? This can help determine what type of Pokemon you need.
Once you tell me more about your needs, I can give you a better answer!