Captain Sim wrote on Jun 18^th, 2021 at 7:38pm:

It just seems. In fact our -300 got proper 128inch GE90-115B. Plus the raked and extended wingtips and a modified main landing gear as well.

Ok, it has 128inch GE90-115B motors, but these work like the 200ER ones (so like a 747) since I seem to understand that this is a copy too?
And the weights are those of the 747? with two engines less, so less power given the weight?