I hate to mislead you and say Perfect World is exactly like WoW. Why on earth would you switch games if they were exactly identical. Perfect World is a large MMORPG with similar favorable characteristics like WoW.
If you are a fan of PVP, I highly recommend trying Perfect World. It has no subscription fee and the PVP system is much better than WoW. It’s especially fun if you have friends to engage in PVP with. The more friends you know playing this game, the more enjoyable your experience will be. There are PK worlds in Perfect World where 99% of the map is PVP. The experience is very fun, and if you are looking for one of many cool games like WoW, give Perfect World a shot!