Bonus points, I tried to do these calcs and the basketball likely has a terminal velocity ≈ 19.7 ± 0.3 m/s whereas the tennis ball likely has a terminal velocity ≈ 22.7 ± 0.4 m/s... As air resistance kicks in the tennis ball should pull ahead, not lag behind!
GDoc: https://docs.google.com/spreadsheets/d/1AnUeQ0RR7a5GA6Nrtef7...