Maarten D. de Jong
I have 2nd edition Vinci...should I replace it with this game? Or is Vinci just as good or better in your opinion...or are the two different enough to warrant both in a collection?
Those are questions which cannot be answered by random internet strangers, even if they share the same interests . It depends on what you like in Vinci, and what you expect to like in Olympos. Or not, of course.
Speaking for myself, I think the similarities between both games are superficial at best. How the games behave, and need to be played, are completely different. Vinci is a rather straightforward sequence of land grabs where everyone walks in on everyone else's territory because it's worth points to do so (with some interesting maneuvring near the end); Olympos is much more deliberate and timely conflict to prevent key technologies, points, and free actions from falling into the hands of the other player. Playing Olympos with a Vinci mindset is one of the ways to lose very quickly: there are five or six ways to score points, some better than others, but different nonetheless.
I like both, but Olympos has much more of a learning curve which easily renders it the more complex game. And because it has this curve your gaming partners may not want to spend much time with it to allow the game some 'burn in' time.