Yep those two links have made me rethink everything regarding memory.
If 4000Mhz is the sweet spot then perhaps this may be better - https://www.overclockers.co.uk/team...4000mhz-dual-channel-kit-black-my-098-tg.html
But this set https://www.overclockers.co.uk/team...3600mhz-dual-channel-kit-black-my-001-8p.html
Could you overclock it to reach 4000mhz?
If 4000Mhz is the sweet spot then perhaps this may be better - https://www.overclockers.co.uk/team...4000mhz-dual-channel-kit-black-my-098-tg.html
But this set https://www.overclockers.co.uk/team...3600mhz-dual-channel-kit-black-my-001-8p.html
Could you overclock it to reach 4000mhz?