Stay with old or take new job (possibly ai or platform?)

Current : backend/platform previously pretty chaotic but on the way up (probably will take multiple months). working on ai implementation (ai bot) with aws, typescript, etc. hybrid role, but commute is very short. team is basically non existent because of previous high turn over before current staff came. New manager is awesome as is director, feel like they are ready to make things better. pay is average for 2 years experience, 35k gpp Opportunity: infra/platform focused and fully remote, focus on internal tooling. seems like a great team, but work is not ai focused, and that seems to be where things are headed. Possibly might be something in the works but this wont be known until i join. Manager is new and still learning but lots of technical skills. company is known for great work culture. pay rise between 5-8k gbp. Having a super hard time understanding what is the best choice. help!