Does it matter that Safari typically runs on Mac hardware? I would suspect having a sandboxed solution as well as teh ability to control the hardware, software

Does it matter that Safari typically runs on Mac hardware? I would suspect having a sandboxed solution as well as teh ability to control the hardware, software and OS would be very secure, but it must be quite good that they have end to end control over the hardware and software and can integrate it. Chrome runs as more of an application "anywhere that google can go TM". So they have to provide better sandboxing as they likely don't control the hardware/must make it easier to ship? On Mac hardware, what do you think is "safer" ceterus paribus, Safari or Chrome?