They are both strong, so I don't think there is a concern there. The solid vinyl will probably outlast a mesh tramp if left out in the weather constantly. Obviously when sailing with a mesh tramp, you'll get some (sometimes a lot) of splash coming through the tramp. On the other hand, any water on the tramp quickly dries on the mesh. We do mostly cruising on our boat and often have beverages and lunch on the water. A spill on the vinyl tramp was always a mess since it didn't drain away, but it's no concern with our mesh tramp.
Good luck,
Jack