That's an over-interpretation of their respective trebles response. On your own head some of these peaks and nulls may remain, or become absent, or be shifted, and their magnitude is likely to be quite different. Your own anatomy and positional variation issues can introduce increasingly significant deviations from test rigs above 1khz and all the more so above 5khz or so :
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https://www.aes.org/e-lib/browse.cfm?elib=16877
If you see a pattern across a lot of different measurements and test rigs (such as Focal's 6khz peak) you may start to draw the conclusion that it may be an intrinsic feature of the headphones that you'll also experience on your head. Otherwise it's probably more prudent to think that it could just be the product of the interaction of the headphones with one's anatomy (or the test rig's).
The same prudence should be applied below 300hz or so because of sealing issues.
In the range where we can be the most confident, ie 300 to 1khz, even up to 5khz, both measure reasonably well that I'd just recommend a test drive on your own instead of relying on graphs to make a decision.
I.e. both are good enough to be worth trying
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