Let me explain the differences I have found between all the places. There are in 4 places you can buy a pick - a - pearl, to the best of my knowledge. They are Typhoon Lagoon, Beach Club Boardwalk, Disney Springs Marketplace, and the Japanese pavilion. With the exception of the Japanese pavilion, the other 3 are owned by the same company. My husband buys me one or two (Sometimes 3) EVERY time we go from various locations so I have had some decent experience with them all.
First, we absolutely PREFER the Japanese pavilion. They are so nice, but the downside is, you're likely to get a white pearl. Sometimes, you'll get lucky, but the majority of my pearls from there have been white. They don't do any high pressure sales and their settings are nice and reasonably priced. My last pick resulted in twin white pearls and a large white pearl which I am hoping to do something in a Mickey setting since the twin pearls are the exact same size.
The other three locations, while having nice staff, will absolutely try and pressure you into a setting of your pearls and they are all horrendously priced. However, the upside here is you're likely to get a non-white pearl. My last pick here resulted in 2 silver pearls the exact same size from two different oysters that I turned into studs and a steel blue pearl I wear in a pendant. These were purchased at the Typhoon Lagoon location. However, the Disney Springs pearl was pink.