> The JH7110 is usually about 10% faster on system level real world tasks e.g. building software.
Pretty sure the U74 CPU from the JH7110 is way worse than the C910 from the TH1520 on pretty much all aspects. So my guess is that your metric is mostly explained by the fact that the JH7110 has a PCIe bus which allows plugging in an SSD rather than an eMMC or SD Card. But such SSD also has a cost. I think this gives some perspectives.
I use both of these boards every day. Constantly, as it's my work.
Building my RVV 0.7.1 gcc 9.2 snapshot takes 111 min on the U74 VisionFive 2, 122 minutes on the C910 LicheePi 4A.
Running DotNET "LINQ" test suite takes 4m30s on VisionFive 2, 5m30s on LicheePi 4A.
Doing `emacs --eval '(kill-emacs)' hello.c` takes 0.72s on VisionFive 2, 0.75s on LicheePi 4A. Close, but the C910 does not win.
Yes, the C910 significantly beats the U74 on every micro-benchmark. Dhrystone, coremark, my "primes" test https://hoult.org/primes.txt, memcpy...
https://hoult.org/TH1520_memcpy.txt
https://hoult.org/JH7110_memcpy.txt
It doesn't translate to the real world, at least in the TH1520 SoC, on the LicheePi 4A sbc.