If you were to ask me anytime you make seeds be it and F1 and beyond or an S1 there is always going to be some genetic/phenotype variation. An unchangeable law of the universe lol. Cuts are amazing when you want the same thing on repeat with no change. From a breeding perspective its also great because the source code is the same too. Creates some consistency in that regard.
If I had to take an intuitive guess. I would say the JW cut came from this forum cut on some level. Not certain is JW worked it to any degree but that would certainly change it a tad. If I recall the history correctly. JW made GG#4 famous and more widely available and this forum cut was passed around early in a tight circle before its breakout. IMO, if you were to ask me they are basically the same thing. THT and myself were not looking specifically for the forum cut. Cloud Life happens to have kept it all this time and we trust Cloud Life when sourcing genetics and he has a particular focus on strains like this.