An equally kitted Niro is £10k more, but the outcome seemed to be I can afford it, so I'd pay it. Well a Model Y is only £10k more than the Niro, so why not go for that. By which point you'll be getting close to the G60...
The current comparables for the MG4 are the ID3 and Born, size wise, or the other MGs price wise. I don't see the point in reviewers comparing it to completely different cars. I recall Top Gear doing a comparison of a small city car with a supercar, but that did appear to be a joke whereas for EVs anything electric appears to be fair game.