509 vs CKX 

There's 2 versions of the CKX helmet and CKX had the quick heated goggles. The difference in the 2 versions of the CKX is back country with more ventilation and trail with the vents plugged up

Great review. I was looking at the CKX helmet today and also love that the breath box drops out when you want. Also agree with the comment below..there are a couple versions of the Titan - original and airflow

I find the ckx to be warmer then the 509 might be because you have the air flow version and not the winter

Wich helmet.would be better for hot weather riding in your opinion