I'd just copy the formatting of the tables that already exist, like Here but if you find a different format that you think works better feel free to use it. Information > Page conformity.
Though, if you do add a win-rate table, please make a note of the version number (i think its 1.2.2753 atm). Its hard to know when direct comparisons like that become outdated - stats for the longsword may change in a future update and invalidate the testing but without a number to know when it was done, its hard to find out. I think some of the other winrate tables already on the wiki are already outdated.
And yes, absolutely feel free to copy and paste what you've already written, a lot of pages are largely similar for the same reason, just so long as its still correct for the new page.