Help me choose a vertical monitor to pair with my 34” ultra-wide!

Hey everyone,
I'm on the hunt for a vertical monitor to complement my 34-inch ultra-wide setup. I came across the LG DualUp, which seems tailor-made for this use case—but I’m wondering, are there better alternatives?

For the same price range, would it make more sense to go for a regular monitor and just mount it vertically? Would I get better specs that way? How’s the viewing angle compared to something like the DualUp?

Also, what specs matter most for a vertical monitor? Size? Panel type? Refresh rate?

Lastly, if you’ve used a vertical monitor, what tasks make it indispensable? And do you think the DualUp has any unique advantages over a traditional vertical setup?

Would love to hear your thoughts!