which of these MTB would you buy?

pep.fermi

I'm (still) on the market for a MTB hardtail, carbon, preferably used because get better value for money.
Which one would you buy, and why?

Here my shortlist:

Cannondale Scalpel HT 4, new
https://buycycle.com/en-gb/bike/scal...n-4-2022-74425

Bianchi Methanol CV S 9.1 – GX Eagle 2022
https://buycycle.com/en-gb/bike/meth...gle-2021-27421

Trek Procaliber 9.8 SL 2018
https://buycycle.com/en-gb/bike/proc...-sl-2018-41570

Giant XTC Advanced 29 1 2021
https://buycycle.com/en-gb/bike/xtc-...9-1-2021-92000

Prices, and components, are very similar.

I'm very disturbed that Carbon bicycles with apparently "same" level of components, when new can have so extremely different prices. The prices of XT Carbon hardtails can range between 1.6k to 6k. The only thing I can think of being different is the "type" of Carbon. But also that I find not really convincing...

About some Carbon frame being light than others: is it really a different "type" of Carbon? Or is it maybe that the manufacturing engineer made the tubes of the frame simply thinner, which of course makes it lighter, but also weaker, so overall not sure that's an overall advantage.

The Rookie

Yes it really can be a different 'type' of carbon fibre, also you can (like tyres) have more smaller threads (superior) for a better layup. Carbon frames can also be designed for outright lightness or add in more crash protection (and weight). Top end frames will come in at about 750-800g, a more durable everyday frame can be as heavy as 1200g. choose wisely!
You've copied abbreviated links, presumably from a thread posted elsewhere and are all broken.