Does anyone know what, if any, differences there are between the Bell 500 helmet and the Bell R/T helmet, other than obvious difference that the R/T has vents and they have different paint jobs?

Thanks in advance for your help.

 

I think the 500 is smaller.

 

The 500 is much lower profile. The size is about the same, so if the R/T fits, the 500 in the same size should as well.