Track race wheels: FFWD F6T or F9T?

So I'm planning to upgrade my Mavic Elipse wheels. Been racing for a year, mostly endurance but may try some kilo and pursuit next year. I'd like one set of wheels that can do more or less everything, and I don't plan on getting a separate disc/5-spoke setup. I've settled on FFWD wheels and wondering what are the pros and cons of the F6Ts vs the F9Ts. I guess extra weight is not an issue. Do I really lose any control having the extra deep front wheel? Do I really get a meaningful aero benefit from deeper rims?

You racing inside or outside?
Do you trust the people you race with not to crash?
Personally I only used deep carbons or disc/4 spoke for National series or nationals. Local leagues had too many crashes to ride £1k of wheels.

Outdoors I found 50mm deep plenty on front

Inside only. And I have been surprised how few crashes there have been. And the crashes that happened haven’t ruined any wheels that I’ve seen. Loads of people on deep wheels and quite a few on disc/5-spoke combo. And worst case, I’ve got insurance. Basically I’ve decided to pull the trigger but just not sure whether it’ll be the 9s or the 6s.

Disc in the rear and a 50 to 80mm deep in the front will serve you well.

If you go really deep at the front it will take a bit more effort to change its speed up or down and a little slower at turning all small effects but there all the same.

I normally ride a disc and an 808 as wells having a set of 808's for outside and a front 1080

I have a FFwd F9T/Disc for indoor racing and a set of F6T's for summer outdoor racing. For velodrome racing I'd go for a set of F9T's.