I bought my split pan in the city Sephora store. I believe it was $65. The Shimmering Skin Perfector Pressed portion (3.69g) is slightly less product than the Mineral Blush (4.25g) section. Doesn't really bother me, as I can't imagine using up either. I prefer having smaller pans but more variety, than a huge amount of a single product. The standalone Champagne Pop highlighter is 8g, I've had it since September last year and I've only made a shallow dent about the surface area of my index finger.
I've been using Prosecco Pop/Amaretto religiously since I bought it six weeks ago. Especially Prosecco Pop, which I'm enjoying quite the love affair with. I prefer it to Champagne Pop, though they are super similar. I sometimes find the reflection of Champagne Pop to be too white/pearly, but Prosecco Pop is a warm yellow gold through and through. It's bronzier, a little darker, and screams of J-Lo glow and summer.
I find the texture and quality of Prosecco Pop to be basically identical to Champagne Pop. I haven't noticed any discrepancies simply because of the split pan format. I can't comment on the Mineral Blush since Amaretto is my first experience with the formula. It is a drier texture reminiscent of NARS blushes. My preferred brush to apply Amaretto has been Wayne Goss Brush 14 or Morphe E4, while I've almost been exclusively using the Morphe M501 for Prosecco Pop.
Becca Prosecco Pop
l-r: Becca Prosecco Pop, Becca Champagne Pop, theBalm Mary-Lou Manizer
As the swatch shows, Champagne Pop is more orange than Prosecco Pop, which is more yellow. Champagne Pop also has a more white gold finish than Prosecco Pop which is more uniform in colour composition. theBalm Mary-Lou Manizer is a lot lighter and more of a pale white gold.
l-r: Becca Amaretto Pop, Too Faced Baby Love, NARS Madly, Clinique Nude Pop
Amaretto appears quite brown in the pan, but applies more of a terracotta peach. Next to Too Faced Love Flush Blush in Baby Love, it's considerably more orange. Baby Love is distinctly more of a cool-toned pink. NARS Madly is closer, but more tan/brown and not as warm. Clinique Cheek Pop in Nude Pop has a similar undertone but is lighter, not as intense, and with a more satin finish than the matte Amaretto.
Overall, highly recommended. The idea of combining a coveted blush and highlighter in one compact is brilliant and when well executed like this one is, great bang for your buck. If I didn't have a full size Champagne Pop already, I probably would've snapped up Champagne Pop/Flowerchild as well.