Pro adds 2 custom comparison requests a month and priority on comparisons you vote for. See Pro pricing
Pro
Request a custom comparison
Requesting a matchup that is not already published is a Pro feature (2 requests a month). This page does not generate the comparison. The links above open live comparisons, and pricing explains what a membership adds.
Want a matchup without a membership? Suggest it on the requests page. That path stays free. Use the email you paid with only if you are already a member.