Cube Reaction C:62 pro - Scott Scale 925 - Giant XTC Advanced 1 - questions on purchasing

I'm looking at buying my 1st Hardtail MTB, 29".

Cube Reaction C:62 Pro: 2000eur
Scott Scale 925: 2900eur
Giant XTC Advanced 1: 4000eur

In my view they are comparable, all Carbon frame and XT groupset
I understand the Giant has also Carbon wheels, and dropper seatpost, but I'm surprised the price difference is so large.
Beside, what makes the Cube so much less expensive than the Scott?

Thanks,
Alberto