Which Job to take? Moving company vs internal move

[Quattr04.]

Backround - currently in a job I hate, and have been trying to move back to my old job in the same company for 6 months:

- now I have a job offer for my old role within my current company, where I have been for 7 years, but have now also been offered another job at another company doing the same thing

The new company is £50k, a better car, (Tesla, polestar, i4) pension is only 3% vs current company 7%, private healthcare, and other perks, generious commission scheme where you get 10% of anything you upsell to customers

Current company is £40k, 7% pension, worse company car (mg5, Renault scenic) commission is £100 per job you sell regardless of the value.

The roles are the same job, both companies are global building automation firms so not like going to a one man band but I am terrified of leaving a company I’ve been at for 7/8 years

Working hours are the same

I had 2 interviews with the new company and it sounds excellent but I don’t have many issues with my current company and only applied externally as the internal transfer process was handled so badly and has taken 4 months to get to offer stage.

Any advice on leaving a company? I know people do it all the time!