We weren't talking about absolute brightness, but efficiency. That is, how bright they are for a certain amount of power. 5630s are NOT supposed to be brighter than the 5050 - those numbers ONLY indicate the physical form factor, they imply nothing about efficiency or maximum brightness.
But, yeah, it's rare that a manufacturer of LED replacement lamps says exactly which LED they're using, and I wouldn't trust their brightness numbers, so it's hard to compare them other than side-by-side.