Short tail vs Long Tail Helmet | Which Is Faster For TT & Triathlon? | Bike Fitting & Aero Questions

Hey!
We're back with a common question. Which is better for a TT & Triathlon between a short tail and long tail aero helmet. Well here's what I think!

[@10ktube]

Great video. For a helmet like the Oakley Aro7, the bowling ball with no tail, is that even worse than a short tail helmet, or does the rounded shape give you more flexibility to move at the expense of pure speed?
I really like it, I can see out of it, but the gap from my head to shoulders is less than ideal and I always reach for my long tail out of paranoia.