The answer isn't straightforward as we do not know which version of the Planet Ocean you are talking about as the development of the rep has gone in several distinct directions (5th generation is unhelpful as there are 42.5 and 45mm version, each with their idiosynchracies). The most accurate is probably the so called "4th generation" 42.5mm cased version which is an excellent choice of watch. The rest unfortunately do not match the very high standard of replication that his model represents.
The TAG Link Chrono on the other hand is undisputably a superb replica - about as good as replica watches get, with only two small flaws that are both correctible.
Looks are a matter of subjectivity though, so I can't help you there, but in terms of which is the better watch as an imitation of the gen, then the TAG wins hands down....
PS. I have examples of both, and the TAG definitely attracts more attention