i have one mate, and have owned the older original version as well.
there is no doubt the new gold spool one runs faster... but i find this makes it blow up it you realy give it rizz... - i have to put 2 red brake blocks in mine.
where as the older one with one red brake block in was totally safe, no matter if you were off the ground, brighton or pendulam casting....
so yes, the lighter spool does make a differece and runs faster than the original slosh.. but it does make it a bit more "firery jack"