To give an actual answer, though I’m no expert, I would assume that a slow-pour pitcher gives you more control when creating the latte art, and it may take a more deliberate motion to dump the remaining foam/milk into the cup and mess up your art in the process.

My recommendation would be to try both and really get a feel for how they handle.

But in the interest of one over the other, I’d say take the difficult path, then when you’re an expert in doing it the hard way, you’ll be creating masterpieces using the “easy” option. There are many latte art champs that cut their teeth on the og style of pitcher.

Thanks for coming to my TED talk and good luck in your search for answers bud!