Some more telemetry comparison of fastest laps in the evening of the test from the big 3.
* Gear Ratios from the Twitter thread were: RBR > Ferrari > Merc.
* Mercedes is the only one to use the 8th gear on the straight to T4, probably due to said gear ratios
* Ferrari opens the DRS 50m later than the others before the finish line
* Ferrari seems to be consistently faster accelerating out of corners
* Ferrari is only one flat out in T7
* Ferrari also seems capable of breaking later in some critical corners like T1, T10 and by a large margin in T13 and T14
It's very impressive to see the acceleration out of slow corners, the engine must be really good, as well as the flat out in T7 must mean the downforce is really good there, but given the decent high speeds it's probably not wing but floor.
It does really seem the F1-75 is a good package of a car.