Hi silverlim,
About Els Casals vs Can Jubany, I completely defer to tigerjohn, as he has been recently. If Estimar is your staple for seafood, I would certainly keep that reservation.
The menu at Mina is the same degustation menu (14 dishes or 10 dishes); it’s simply that sitting at the counter allows one to see first hand the preparation and for many is more “fun”.
Tigerjohn, I believe, has been to Mina 3 times, with one disappointment, I think, and the 3rd time excellent (I just read his post on a long thread, “Which 3 star-Mugaritz, Arkelare (sic) or Martin Berasategui?”)
Mikey8811 on that same thread, had a different take but enjoyed the desserts.
Tigerjohn can give you a better take on Mina.
Since you’re staying at the beautiful Palacio Arriluce in Getxo, not to confuse the issue, but…
those who stay there may want to visit neighboring Portugalete and the restaurante of the Gran Hotel Puente Colgante, “El Paladar”, where female chef Zuriñe García, formerly of Andra Mari in Galdakao, has been receiving some fine reviews. But she offers 2 tasting menus only.
But never mind…Horma Ondo is strictly a countryside, more “humble” in a way, traditional grill restaurant, one of Vizcaya’s best asadors, for both wild fish and for meats, so in a certain sense a visit there AND to the other great asador, Etxebarri would be redundant.
Horma Ondo is far, far easier to reserve since it hasn’t received the immense international claim and status as “the world’s second best restaurant” from San Pellegrino.
Zárate in Bilbao is more fish focused than meats, if that’s your preference. This chef from the fishing village of Lekeitio has always been known for his superb grilled fish preparations straight from the piers of Lekeitio and Ondarroa. Here you have the option of a la carte or tasting menu.
Aurt is counter dining in the Hotel Hilton Diagonal Mar, space for 20 diners grouped around 3 counters for “show cooking”. Tasting menu only.
You can see the reviews of all your Barcelona choices in the Macarfi guide for Barcelona-