My personal experience from trying both is:
1) The Elephant FFFg I tried was junk, wouldn't even shoot in percussions due to slow ignition, 4.5lbs still sitting in the garage;
2) Goex FFFg is simply outstanding, clean, fast, accurate...all I use;
AND, I buy it by the case, $220 delivered to my door (PA to NC) which is $8.80/lb, from
J&J Pyrotechnique in Moscow, PA