XC race bike advice

I'm looking to buy a new XC race bike for my son, and I'm after some advice. I have the opportunity of a discount from a bike shop, so I'm focused on Trek and Scott, as that is what they stock.
I've narrowed it down to these 4:
Scott Scale 930 £1900
https://www.scott-sports.com/global/en/product/scott-scale-930-bike?article=265211007
Scott Scale 925 £2300
https://www.scott-sports.com/global/en/product/scott-scale-925-bike?article=265207008
Trek Procaliber 9.6 £1700
https://www.trekbikes.com/gb/en_GB/bikes/mountain-bikes/cross-country-mountain-bikes/procaliber/procaliber-9-6/p/2076600-2018/?colorCode=black
Trek Procaliber 9.7 £2350
https://www.trekbikes.com/gb/en_GB/bikes/mountain-bikes/cross-country-mountain-bikes/procaliber/procaliber-9-7/p/2077690-2018/?colorCode=grey
My son's preference is the Scale 930, as he prefers the colour scheme (its like Nino's apparently...). But the 925 looks the better spec (GX Eagle), and its the lightest of the 4. The Procaliber's are very nice, and the 9.7 is mostly XT, though a bit heavier than the 925 for similar money.
Any thoughts on these?
One option would be to go for the 930 and use the saving to get a nice set of race wheels, keeping the stock ones as spares.
I've narrowed it down to these 4:
Scott Scale 930 £1900
https://www.scott-sports.com/global/en/product/scott-scale-930-bike?article=265211007
Scott Scale 925 £2300
https://www.scott-sports.com/global/en/product/scott-scale-925-bike?article=265207008
Trek Procaliber 9.6 £1700
https://www.trekbikes.com/gb/en_GB/bikes/mountain-bikes/cross-country-mountain-bikes/procaliber/procaliber-9-6/p/2076600-2018/?colorCode=black
Trek Procaliber 9.7 £2350
https://www.trekbikes.com/gb/en_GB/bikes/mountain-bikes/cross-country-mountain-bikes/procaliber/procaliber-9-7/p/2077690-2018/?colorCode=grey
My son's preference is the Scale 930, as he prefers the colour scheme (its like Nino's apparently...). But the 925 looks the better spec (GX Eagle), and its the lightest of the 4. The Procaliber's are very nice, and the 9.7 is mostly XT, though a bit heavier than the 925 for similar money.
Any thoughts on these?
One option would be to go for the 930 and use the saving to get a nice set of race wheels, keeping the stock ones as spares.
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Yes, a good point!
Not looked at the links but the £2k mark I doubt any of them will be a disappointment.
Just be sure you get the right size, if still growing then may be good for slightly larger Frame.