Entry points ? The visits are accurate for the website and app. If you're talking about AI overviews, then that's meaningless for reasons I've already explained.
I do understand why it makes it very hard to compare but it's certainly not meaningless. Google's AI overviews are pretty much the only way that I use AI.
I use Google's AI much more often that OpenAI's but the URL I use is usually google.co.uk and so wouldn't appear if your numbers.