Monitor question 160hz or 240hz?

Hello, (Uk based)

I have been looking for a new primary monitor and have been eyeing up the jump to OLED after weighing up getting a 4k IPS but having seen OLED in person I am leaning towards that. I was looking at the 1440p models as the 4k jump seems to be a fair bit,, however, I have just spotted this deal on Currys: https://www.currys.co.uk/products/msi-mag-321cup-4k-ultra-hd-32-qdoled-curved-gaming-monitor-black-10274868.html - Is anyone able to weigh in if this is as good as it seems, or am I missing something? The 1440p 27" model is 240hz but 50£ less. Is the HZ more beneficial than the 1440p - 4k jump?

Any help or suggestion appreciated.
Thanks!