I have never used white peppercorns I like the taste of the pink but they are botanically different. My area has a bit of worship for the Brazillian pepper tree and I've seen peple collect the berries.The green brined can be iffy in quality and I've eaten and enjoyed that flavor burst fresh in SE Asian cuisine but only once enjoyed the experience but not here in US.
I have taken to a rough smashing M & P of the black in my curries and keep a simple grinder for finer applications. My reveal experience with the extremely rough cracked was sharing with one neighboir how we were cooking the beautiful tuna another brought us from Cabo San Lucas. They used whole black as a coating in the pan. Intensely different.
This old topic has some worthwhile discussion on uses https://forums.egullet.org/topic/20586-pepper/