The only thing I see why it's kinda hard to compare is other city's buy what the manufacturer has to offer fdny makes them design a new style. When you buy one of there designs generally speaking the bugs and kinks have been worked out , in the case of the engines it's a brand new thing for KME. It does sound like the over all consensus is good for recent KMEs hopefully that will be the same with the engines, can they do worse than the ferrara sticks ?