This forum is borken - SANLink 3 doesn't have its own category yet.

What ethernet chips do Sanlink 3 N1 and T1 use?

This information is absolutely critical for making a buying decision, and it's not in the product specification. Also the knowledge base page only has the pages https://kb.promise.com/thread/what-is-the-os-version-compatible-for-sanlink3-t1-and-n1/ and 

And, is there any notable functional difference between them, difference in speed, connectors?

Or is N1 just smaller and hence better.

The product specs at https://www.promise.com/Products/SANLink/SANLink3-N1/ and https://www.promise.com/Products/SANLink/SANLink3-T1 respectively look exactly the same, they reveal no difference at all.

This clarification is also needed for making a buying decision.

(N1 has product code name SL3N1GL .)

Please clarify ASAP, thanks!