When I downloading JoomlArt templates, I noticed that there are two versions of T3 Framework: one is T3 Framework with filename plg_system_t3, the other is T3 Framework V2 with the filename plg_system_jat3. This is confusing to me.

Take a look at the version number: the latest version of T3 Framework is v2.6.0, but the latest version of T3 Framework V2 is v2.7.2 .

It is hard to say that T3 Framework V2 has been deprecated since it has higher version number.

So, which one is alive? Which one is the "real" version and the better?

Thank you.