Nope they’ve updated their relative performance charts on this one:
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AMD Radeon RX 7800 XT Specs
AMD Navi 32, 2430 MHz, 3840 Cores, 240 TMUs, 96 ROPs, 16384 MB GDDR6, 2438 MHz, 256 bitwww.techpowerup.com
The 9070XT is 36% better- no need for my mad maths skills! As they’ve done the working out for us.
The distance between the 6700 XT and 7800 XT is also lower in that chart than it is in the review, i think they treat that chart differently, no of it seems to add up with their own reviews.