Turns out there were a lot more changes than I first expected there to be compared to the release renders:
All Cars:
Removal of carbon on upper endplate section
Rear Wing Endplates reworked for bigger numbers
Swapped Aero Paint and Keco around
Decreased size of P1 NTT and Firestone on the element in front of the rear tyres
Swapped and resized Expand Machinery and NTT Data on sides of front chassis section
Reworked Sponsor Size and Positions on nose cone
Reworked Orange section on the front/top of the sidepods
Moved Lucas Oil on top fin forwards
Increased Size of Chevrolet badge on aeroscreen
Added satin finish to paint
Added small Expand machinery towards back end of sidepod
Added black section on openings on rear wing
Increased size of numbers
Updated sponsors and spacing on headrest
Moved, resized and changed colour of PPG logo's
Added Gil de Ferran tribute
Added crew details
Added a second version of car 6 with Callum Ilott as the driver
Added aeroscreen interior decals
Fixed VRC decals appearing on top of the aeroscreen
O'Ward
Added Smart Stop to front wing Endplates
Increased size of the Arrow sponsor on sidepods
Removed Electrolit on right side floor
Added Fastenal logos
New Smartstop sponsor near gearbox
Malukas
Changed aeroscreen colour
Increased size of NTT Data on sidepods
Rossi
Added Smart Stop to front wing Endplates
New Smartstop sponsor near gearbox
Added Genesys logo