From what point of view?
Let's see money first, as usually that's what companies do. In this case, as an employer, I don't have to spend a boatload of money to by expensive electronic equipment to my staff. Clearly a win, right? Well…
But there is also a security side, and its implications. When I provide equipment, I do so so only I have total control over it. This might sound bad, like I want to spy on my employees, but it's not the case. I want to make sure their computers, and probably company phone, only have software from trusted sources installed. I keep those software up to date to have all the security features. Thus, when you work from home (for which I also provide secure means like a strong VPNQ), I can be sure attackers won't get our company data through your infected home computer or router.
However, if I look from the employee's point of view, the first one is obviously more convenient (given that they have their own stuff, of course). I don't have to wait for the IT department to install new software, I can even install some games, and so ON. But I guess, again, you can see the security problems here.
There is a solution I saw several times: I have my own notebook, and my employer installs a second OS on it on an encrypted partition. Although it might present some driver problems, it seems to work fine in those cases.