While reading, I couldn't help but wonder about the rationale behind the mixed tread patterns.

The current G-One product line goes: RS->R->RX
The old G-One product line went: speed->all round -> bite ->ultrabite.

I used the Ultrabite on both tires for a while, but I became frustrated with the poor rolling performance on British tarmac. To improve this, I tried using the All Round tire on the rear while keeping the Ultrabite on the front, both in size 42-622 (measured at 45).
However, this setup performed poorly; during off-road corners, it felt like a front-wheel-drive hot hatch with bald rear tires. The rear was skittish, and it seemed like the front was cornering while the rear continued straight, only to be eventually dragged around the corner. I think the difference in grip between the two tires was too great.
I switched to the Bite tire on the rear, which slightly reduced rolling efficiency but significantly improved handling.

I'm curious if you've experienced something similar when mixing the RS with the RX tires, and whether it might be better to combine the R with the RX instead.

I retried the Bite and Ultrabite last year for my final CX race because my Michelin Mud tires had worn down and weren’t suitable for mud. While the combination generally worked well, it lacked grip on off-camber banks, resulting in a significant crash (the second major crash I've had in the last five years, and both involved the Ultrabite on ridge/off-camber sections).

Now, I'm planning to use the X-One R tires (which have a pattern similar to the G-One RX) due to the hookless rims, as the Vittoria tires are not compatible. Any feedback on fast, slippery cornering would be greatly appreciated.