Backup both Exch 2010 & 2013 in between migration

We are starting to move mailboxes to Exchange 2013 in our environment and I would like to start backing it up using BE2014. I went to install Ex2013 mgmt tools and it complained that there is already Ex2010 tools installed. I don't want to stop backing up Ex2010 yet but at the same time cannot go without backups for new Exch2013.

Is there a workaround?

Options

1. Do I have to do windows backup(role) based for Ex2013 till I could migrate over? Then backup the files.

2. Or Bring in new BE2014 and backup to separate volume and then move it back?

Thanks