Assuming that I'm allowed to sell both, it depends on the model of lambo I'm getting. The cheapest one is $230k while the nicest is $8.3 mil
I could sell 300 of my cuts at wholesale and have the equivalent of the low model in less than a year, I couldn't pass on having an instant 8 million in my pocket though. I'd be set for life with that and have my pick of any meats in the world without a second thought with that kind of money.
If selling isn't an option, I'd take the meat since I wouldn't be able to afford the upkeep on a lambo and I don't like a lot of attention anyways.