Barbie Dream Besties leaked at the beginning of this year, and released this summer. The first wave has 4 dolls, Malibu Barbie, Brooklyn Barbie, Teresa, and Renee. A second wave is coming out around Christmas with Daisy and Ken.
Here's what I've learned from binge watching reviews on Youtube.
Their head sculpts are strikingly similar to Ever After High g2, when everyone got smiles.
They have 11 points of articulation, like Monster High g1.
They have their own unique body and foot sculpts, different from Barbie, Monster High, and Ever After High. Nobody else is a perfect fit, but Barbie can wear BDB clothes, but Barbie clothes might be too big on BDB dolls, and the shoes are not a match either. They can wear some Rainbow High, but again, it's not an exact match.
They don't come with stands, but they fit fine on those cheapy plastic Amazon stands that you can buy in bulk.
There is a web series that goes with them. Episodes are 3 minutes long. The thumbnail stills don't look good, but if you watch a few episodes, it grows on you. They also have 2 minute long music videos.