Would be really good to have more concrete/quantitative information on this.
Would be valuable when comparing to other options like the LCR018-D, https://chinertown.com/index.php/topic,6333.0.html
On the xmcs homepage they state which carbon fibres they use: t800 for GT, t700 for the others (except for the gravel, don't find it instantly)...
The other thing is (pure speculation on my part here!!): open mold vs designing your own thing... Is bet that the gravel comes from an open mold, while the GT is completely individually designed... If you share your mold with nanny others you can produce higher numbers and therefore cost per piece for design etc should go down... Probably there is also other economy of scales factors involved...
If I think about when I've heard about the race frame for the first time and how long it's been I bet this is an individual design... I know that the GT was an individual design and that there have been some tweaks to it since my very first GT (the Seatpost topic!)
I'm afraid that's the way many high quality brands are going... If you've got people there who are passionate about what they are doing and want to offer high quality, the continuous increase in quality will affect prices...
Hambini called xmcs "the next winspace" and many around here already said they were scared that this would mean an increase in prices...
As for the GT I can say: if the price/quality ratio stays the same I'm happy (since all of the prototype problems were sorted out and I should have a new Seatpost by tomorrow)...
But I guess there's just different demands and offerings...