I don't have stats handy, but this has been published lots of times by many different authors. As others have said, comparing browsers fairly is difficult. But

I don't have stats handy, but this has been published lots of times by many different authors. As others have said, comparing browsers fairly is difficult. But Chrome is simply not an efficient browser on Macs. Anecdotally, it uses more memory and measurably consumes more energy. The Mac's fan will run more when using Chrome, and you will need to charge more often. If you use a lot of tabs, your entire computer will slow down. There's market validation for this assertion. There is a YC-backed company currently working on tech to offload Chrome tabs to the cloud so the browser uses fewer resources. This is not something that would be identifiable as a problem in Safari. If you have access to a Mac, you don't need to take anyone's word for it. Just use Chrome for a few days and then use Safari for a few days. The difference is pronounced. If you use your browser heavily, you will notice. Since password managers are in the news, Safari also syncs passwords to iOS devices (password sync also works in native apps). It's free.