Not sure about this specific situation, but over many years of experience in the past, it seems that people live to regret installing betas in with other stuff.
It's highly likely that the release versions of the two Visual Studios will co-exist happily.
It's just that betas aren't intended to be bullet-proof. They're intended to be confined to sandboxes. If you don't have the luxury of other machines, could could create a separate partition or virtual machine to install the beta in?
You really don't want to mess up your development workstation and have to reinstall everything.