According to me you should give the second paper too if you are not much satisfied or sure about your marks in the first one, because sometimes it happens that we are pretty much confident that we have done better but due to few silly mistakes marks are deducted and as we know competition is growing day by day so I think you should give the second one too,I am not scaring you I am just telling you the fact.

Hope your doubts are clear now and good luck for your result