I grabbed a pitcher in the last restock and I want to know which one is worth more.

They are both priced on shop search. I think that would be a good place to look for your pricing questions.

Although I would likely keep it as the pitcher if you don't want the achievement/glade pet.

You can always (during the times the glade is open) turn it into a glade potion but you can't revert it back to the pitcher.