Both sets are very strong, so I would tend to believe there's no wrong answer as long as you justify your opinion.
I'm tempted to vote for Pasa because as a set the par threes really make you hit 5 different clubs. The yardages from the tips are 217, 194, 177, 141, and 181. The 8th at 177 is downhill at least a club so you really have a nice variety of shots to hit.
Not that the Shore is bad in that respect either. The yardages there are 155, 219, 224, 178, 185. Since #7 and 9 go in opposite directions they would seem to require different clubs often due the ever-present wind. Seems like the same could be said for #11 and 14.
I actually would put #15 and 18 ahead of #3 for my favorite par three at Pasa. #7, 9, and 11 at the Shore are all very strong as well.
I like short par threes, and #15 at Pasa seems a tad stronger than #3 Shore to me, so with that as the tiebreaker and with little to no conviction at all I'll go with Pasa.