Your image does not display. The simplest thing to look at to determine which weapon is better is the "item level" on it. Below 50, this will be pretty close to the minimum level required to equip it. Beyond 50, though, they get significantly higher (with the current highest being 275 while the maximum character level is currently 60).

It's slightly more complicated as a conjurer since you have both one- and two-handed weapon options, but you can just calculate the average of a one-handed weapon and shield to compare to that of a two-handed weapon.

As for your specific questions, auto attack refers to basic attacks performed periodically and automatically on enemies (as opposed to specific special abilities you manually activate). It's more relevant for classes that focus on damage rather than healing, but you can walk up to enemies and whack them with your cane or wand. On a weapon, the auto attack number refers to how much damage such attacks do. The delay refers to how far apart those attacks are in time. Potency is how strong an ability is. All of these numbers are relative and based on additional factors like the stats of you and the enemy, so the "potency" numbers allow you to meaningfully compare one ability versus another.