I have a 2016 5.3 (6L80) Tahoe and a 2019 6.2 (10L80) Yukon. The 6.2 is faster and is shifts very smooth. Very fun to drive. However, the 6.2 recommends premium fuel. The 5.3 is has plenty of power and is better on gas mileage. I don't know if all 5.3s had the 6 speed transmission, but I...