Actually, it doesnt seem that secure, I just discovered I could Export the notes from the Business part as enex files and then log into the Personal part and Import the enex files and now all the Business notes are in one single personal account.
This isnt a business vs personal thing - I own the company, so I want to search for things and find things whether personal or business doesnt matter, I want to find it when I want it - and I dont want to have to remember where I stored it and then have to switch between personal and business. I dont have a personal AND a business phone - I have one and I want one Evernote that I can search at once. Its a shame Evernote did this, if Business side was better I dont mind paying Subscriptions, but for me, to have Business gives me less functionality as it prevents me from searching ALL my notes at once.