Key is on the page in case you still don't know how to read these
https://rr3.fandom.com/wiki/User_blog:DpWang74/Performance_Comparison#Formula_E_Season_7_.28Base.29
Group 1 cars should require one less Principal level up (T8875 D5 P9) than Group 2 and 3 (T8875 D5 P10) for series completion (311 gold vs 345 gold), but they should all require similar upgrades for the SEs
For New York and Hong Kong - might the better acceleration and grip matter most? You spend so much time coasting that brakes hardly matter.
Of course, differences are so small as to be insignificant.
One car from group 1 is the "cheapest" option.
Nice nice
What do you think?