The comparison for me starts and ends with being a dual threat. An actual threat to throw the ball and run. To me, thats who RG3 (whos career after year 1 went downhill thanks to injuries) was suppose to be.
Nobody runs the ball like Lamar, the closest was Vick and he has already obliterated the single season rush mark and followed it up with another 1k season. The moment you factor in throwing? Not even close. Lamar lead the league with passing Tds last year. This being Lamars second year starting, which is considered a "down" year, he threw for 26 Tds which would be a career HIGH for Vick who threw 21 Tds with the eagles.
Lamar is what RG3 was suppose to be, but with better legs. Way....WAY....better legs lol
I can see the Steve Young comparision, I'm waiting on that a little longer.