I've only seen SoPa, and only about half (spread out over the course of the season, so missed a few chunks) but I voted Gabon. SoPa had some fun characters and I enjoyed the early parts but it was pretty awful during the merge.

Gabon is one of the five seasons I don't know much about beyond winner and one or two highlights that I've kept myself from learning all the boot orders and plots of so I can watch it someday. So, I don't know that much about it, but it's probably better.

SoPa has aa marginally better logo.