The gist of what's being said on this post and the thread on Apple's video is that everyone is generally around the same size for various features. So we might get marketing speak that we're on "10nm" or "7nm" or "5nm", but that doesn't correlate to much. Just like "4G" and "5G" technically mean something, that doesn't mean the carrier offers speeds remotely close to the specification they say they provide.

Features lists generally include the transistor gate pitch, interconnect pitch, transistor fin pitch, and transistor fin height. None of these features are actually "10nm" or "7nm, but range anywhere between 30nm-60nm. Although sources are conflicting online, it looks like Intel 10nm is about on par with TSMC 7nm. Some features for Intel's 10nm are larger, while others are smaller than TSMC 7nm. Also _most_ sites are saying Intel 10nm has a higher transistor density, but information is kind of flaky on this metric.