I doubt you've had strength competitions with every vegan you've ever met. I'm a vegan and I would bet 100:1 I'm stronger than you, at least as it goes by traditional powerlifting standards.
I'm 150#/6'1", bench 240 (ok, my genetics are a serious advantage here), deadlift 340 and eat about 1700 calories a day. If you can go better pound for pound, I'll accept your point.
I'm 210#/6', My 5 rep maxes are(I don't do 1RMs): bench 275, DL 495, squat 455. You do seem strong, but I am pretty sure that is due to your genetics and whatever exercise you get, and not due to the red meat diet you have.
I started lifting as a vegan (properly supplemented) and switched to primarily meat when I stalled my progress. My 1RMs were 270 DL, 180 bench then. Same weight and height. I only saw progress when I started eating meat, although the dairy probably helped too. Also seriously helped my recovery times. I think the increased digestibility of dairy and meat proteins allowed my body to heal enough to actually build strength, and I'm now lifting at a much higher class for my weight and build.
One interesting thing I've noted is that people who were raised eating meat and doing farm chores are much stronger than vegans who work out in a typical fashion. I arm-wrestled a monk who doesn't eat meat, but was raised on a farm, and he had a lot more endurance than a typical plant-based person.