To trust seller? Two listings, same with no model

Hi, I hope you can offer some perspective on this.
This laptop’s model number isn’t included on the page. In light of that, would there be any reason to distrust the seller, being that they offer the same thing on this other page as well (with a slightly different price)?
Also what is “By UpgradePro” on top of the page?

Thank you if you can help.