Yes, that's me. I am stage 4.25. I was running an 18psi map and was wishing I was on the 20psi setting as was packing a few more MPH at the end, but that said as soon as I hit 6th the power or aero let him reel me back in. He said afterwards it was the closest run he had all day. Mentioned he was running 650ish. I notice in the vid actually he has a 9e sticker on the side which is the tuning shop that made the crazy 911 that got top speed on the day running "only" 60% power due to a boost leak.
Next year will be rear spoiler off which should help in 6th.
Edit: Just noticed you mentioned it's your bro. What spec is his 911 then? Also, I didn't notice any difference in lanes other than the left one having some crap on it and being a bit crashy towards the end if you weren't careful with your placement. It also nables you to get a better exit from the corner going onto the main straight. My top speeds were similar either way.
Here is the clip from my car:
https://www.youtube.com/watch?v=OAM8S03p2Ys