[BluffTHIS!]

I think it is logically correct though to say that both camps would suffer emotional pain if proven wrong. We Christians would suffer emotional pain because having placed our hopes in an eternal afterlife with God that makes our sufferings here insignificant in comparison, we now would be confronted with a reality in which what we get in this life is all we can hope for, and for a significant portion of humanity that is grim.

Non-believers as you pointed out would also suffer emotional pain because they would have to change their entire world view, plus would often have to make significant changes in their lifestyles to conform to relgious behaviour and moral standards. There is however a "kicker" here for them. If upon having been proved wrong, they now did not accept religious faith, since they could not sincerely maintain unbelief, they would then be subject to the consequences of knowlingly rejecting that proved faith, consequences that would attach in the afterlife.