Two-step vs. two-factor authentication verification

I currently have the two-step verification enabled on my devices (iMac OS X 10.11.5, 6s and 9.3.2 iOS iPad iPhone), but I've recently learned that two-factor authentication is available.

1. I don't see what the difference is; two factors is better than two steps and - if so - how?

2. do I need to disable the two steps before moving on to two factors, if I decide to change?

Thank you.

cation-bumps-up-security-and-ease-of-use.html http://www.Macworld.com/article/2988668/Security/Apple-s-New-Two-Factor-authenti

For Apple ID - Apple Support two-factor authentication

Frequently asked questions about the audit in two steps for Apple ID - Apple Support

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Tags: Mac OS & System Software

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