Which is faster 49mhz or 27mhz for RC cars?

Which is faster 49mhz or 27mhz for RC cars?
Personaly, i have to R/C cars that are 27 MHZ and 49 MHZ and my 49 MHZ goes faster than the 27 MHZ. but the 27 MHZ has much more control than the 49 MHZ.