Bumble BFF is for platonic connection. It means if you are looking for best friends and nothing more than that, or you want to make friends free from any physical desire, then you can use the Bumble BFF feature. Bumble Bizz is for professionals. This mode is similar to LinkedIn, where you upload your educational qualification and look for a job. Bumble Bizz is not competing with LinkedIn or any job searching website, but the basic idea is almost the same.