So a 400 lbs Sumo Wrestler bencing 365 is stronger than a 140 lb person benching 285?
Yes. In the benchpress.
Or, to put it extreme:
A 400 lbs sumo wrestler who benchpresses 251 lbs is stronger in the benchpress than a 155 lbs ripped guy who benchpresses 250 lbs.
The ripped guy scores a better Wilks point, and could be considered a better benchpresser.
But stronger? No.
And if you look up your score on the Wilks, you were better @ 238 lbs.
This is just the facts. You don't score as high at a lower bodyweight as you did at a higher bodyweight.
To conclude:
1. You're not as strong.
2. From a powerlifting perspective, taking your lower bodyweight into account, you are not as good lifter today.
What about your other lifts? How has the squat and the benchpress changed?
I'd imagine that the deadlift is where you can keep most of the strength, and you've lost a lot of strength in the squat, since a big gut is very helpful in squatting big.
YIP
Zack