Well, with 80 different pages to add the link to, nobody should expect Alex to just snap his finger and magically have it appear on every page.

The most interesting charts to compare are ones in which the strat, or at least the optimal racing line, differs on PAL, or is more difficult to attain (e.g. VL2). Keeping in mind that the NTSC/PAL speed conversion factor is 1.0254, some WRs can be much faster on NTSC than on PAL due to the MC2 longboost being more effective or the GV2 platform jump being doable at a sharper angle. I actually checked the GV2 flap WRs, and the NTSC WR is about a tenth faster than the PAL WR, adjusted for the speed difference. If I perfectly reproduced my NTSC racing line in a GV2 PAL flap, I'd have a time that places in the top 15, but we obviously cannot realistically expect this to happen due to that platform jump and the more perpendicular jumping angle that will be required (i.e. cannot come out of the jump as tight). At best I would be able barely eke out a Titan standard, just as on NTSC.
And perhaps even more surprisingly, if the NTSC 5lap WR racing line were reproduced on PAL (most likely impossible), the PAL GV2 5lap WR would be in the
lower 59"xx! (well over a second faster than where the PAL WR stands now!)
By multiplying NTSC WRs by 1.0254, and dividing PAL WRs by 1.0254, we can see if it's possible to be "faster" anywhere on PAL than on NTSC, as PAL at least provides the bonus of sharper drifting angles (but is mostly otherwise disadvantaged vs. NTSC).
A link that allows us to switch between NTSC and PAL on the fly would make comparing top 10s, top 20s, etc. more convenient, showing how difficult strats are on PAL compared to NTSC by how many players were able to execute them, etc. Could even be a useful tool for us players for deciding whether or not an NTSC strat is viable on PAL, by seeing how many players can reach the Myth, Titan, etc. in each version (standards of times often
are a good indication of the strat used to achieve them; see VL2 and its island jumping routes).
P.S. By a check of both the NTSC and PAL Summary Pages, there are currently 68 players who have both an NTSC and PAL timeset. (548 NTSC players, 563 PAL players, 1043 total players)
It's also interesting to note that there are currently no players from New Zealand on the Super Mario Kart Player's Page. If there were they would almost certainly be PAL.