Catlink Pro-X Luxury vs Litter Robot 3

Hi all, Moving in with my girlfriend and our 2 lovely cats, and I would appreciate some help choosing a good robo toilet for them.

These 2 are approximately in our budget (LR 4 is very expensive where I live) so I was wondering what’s your opinion on Catlink Pro-X Luxury and Litter Robot 3.

https://www.catlinkus.com/products/catlink-self-cleaning-litter-box-scooper-pro-odor-eliminator-set

https://eu.robotshop.com/products/litter-robot-3-automatic-self-cleaning-litter-box-eu