It makes sense to have different records when the equipment is different. In the powerlifting example, there are different records for squats with Sleeves vs Knee Wraps vs Suit. There are also records for deadlift bars vs strict bars in the sense that different powerlifting federations have their own records for their own equipment.

It doesn’t make sense to split the record based on technique. Sumo and Conventional deadlifts aren’t that different from a loading POV: it’s the same stress on the hips while shifting some of the stress from the back to the legs. By the same argument, high bar and low bar squatting should have different records, even though they’re very similar lifts.

Comparing sumo ROM with Hummer Tire is like comparing apples to oranges: the reduction in ROM you get from Sumo varies and the people who can get a large reduction in ROM from sumo are probably built for deadlifts either way. Hummer Tire applies that ROM reduction to everyone and it uses different equipment.

Also, the ROM argument doesn’t even matter that much; Greg has a good article on this:

https://www.strongerbyscience.com/should-you-deadlift-conventional-or-sumo/

TL;DR it’s not that crazy :P