Hard choice but I went for Pirates. Phantom Manor has a great exterior and setting but is mainly the haunted mansion with a few changed out set pieces like the graveyard/ western town. It does have dreamfinder as they mayor though which is a good easter egg.
Pirates tries a bit more to be something different- the carribean queue area is great and the ride has some fun differences like the elevated view from the fort, dueling pirates etc. I remember reading when DLP opened that placing the skeletons at the end was meant to be a warning of what happened to the bad eggs. Its not my favourite version of the ride (I think Tokyo is still be best) but it is a good ride in its own right
i have to say though it was a close call if I’d seen phantom with the Vincent price narration or pirates with the movie tie in my choice might have flipped