Sapien Ones are basically the people who have teh same armor and weapons i think is cool btw.... There like the army that is fought against by the lone ranger (you know the movies....)
back to the point though
when you ask which is beter you have to take into the account of what your looking for if you want a Frontline fighter Sapien One But I think that if you want a super sodlier with some more natural ability then Sapien Syn for teh win lol
Plus: If you want to look preety while kickin ass and taking names then go syn....