The points guy has a good comparison of the 2 cards. I haven't transferred the points but don't see any reason it'd be difficult and it's 1:1. This is not an airline card, I am not aware of any benefits directly with the airlines. For me it's easy even though I don't put a large value on the PP since I use it hit or miss, maybe $100/yr at most. There are other ways to get Priority Pass though most don't 'give you the restaurant access which has been my main usage. In your situation I think it'd be a good card if it's your primary, I think you'd make out well if you pay attention to how you use the points. But you'll need to compare to your other options and volume of usage. It's not a good option to have as a back up card IMO but wouldn't be that costly if you made sure you collected the main perks. At one time I had 2 premium cards but with the credits and bonus points, it made sense but with a couple of changes in the other card and in our personal situation, didn't make sense to keep them both though it would not have been a big deal. I have limited cards at this time. CSR is my main card, American Airlines (Delta's gone), Disney and Bonvoy. And I'd likely be fine with 3 losing the Disney card and one could even argue against the Convoy Card at this time.
I also travel with a debit card for travel, either my CU card which is attached to a separate checking I ONLY use for travel and have NO connections to other accounts so it doesn't pull from other accounts if compromised and they reimburse for ATM fees in the US. And I travel internationally with my Schwab Bank Debit card which reimburses for all ATM fees and can easily be activated and deactivated on their app.