2 Different version of the site on same domain / subdomain.

I want to host my Public version of my site on www.mysite.com and the the business version on business.mysite.com same in theory and instagram.com and https://business.instagram.com/ as my message is totally different to public apposed to business however the are internally linked from a login perspective they will need to interact. I could set up a separate wix site displaying all the from end info i gues then do a redirect to a business login on main site all seem like a work around tho.

Any official method or better workarounds please guys?