Memory foam mattress is way too hot. Which Origins is cooler?

Hi,

I currently have a memory foam mattress and am finding it way too hot. Are both the origins 1000 and origins 1500 cool to sleep on, is one cooler than the other? Really like the look of the softer 1000 but wondering if it is significantly warmer than 1500 I am 10.5 stone and husband about 13 stone, both side sleepers.

Kind regards