Re: What are the differences in the KMs??
most KM's will smoke about the same with a few exceptions.
-ice chambers tend to have cooler smoke for the duration of your bowl
-KM's with brass cores tend to last longer
(some stainless steel is actually galvanized which allows it to rust)
-the KM's with the "chinese hat" purge valve don't seem to purge as well as the old style
the other obvious differences are looks and preference