https://www.dawgnation.com/football/facts-quickly-dispense-with-notion-that-floridas-dan-mullen-has-anything-over-georgias-kirby-smart

Mullen is 79-47 overall (.626) and 38-42 (.475) in SEC play; Smart is 32-10 (.762) and 18-6 (.750). Also, Smart has won two division titles, one conference championship and made one college football playoff. Mullen remains zilch on that front.

As head coaches, Smart and Mullen have met just twice. Smart's 2-0 in those games, with Georgia defeating Mississippi State 31-3 in Athens in 2017 and the Bulldogs besting Florida 36-17 last year in Jacksonville.

Good stuff, as always AFD.
I'm guessing this may have been in response to that nonsense click-bait article by notorious booger-eater Mike Bianchi, but a couple more to add would be that in 10 years as a head coach, Mullen has yet to log either a Major Bowl win, or a top 5 poll finish. Kirby has done both in his 3 seasons.