You notice some differences just from the air temperature going into the engine too. Especially in a turbocharged car.
Colder air means denser air. Denser air means more oxygen molecules in the same volume of air. More oxygen means the engine can put more fuel and produce a bit more power.
Depending on your driving style, i.e. If you have a heavy foot, this means a bit more power and fun, but you're burning a bit more gas too.