Could some of the technology-affine folks dive into this here please? I want to learn more.
After reading your post history, I think you're legitimately searching for information. Though, I'm not sure where you're getting your facts about BTC devs saying XMR is flawed at the core level--some praise it in fact--as Kazuki49 has pointed out. I believe Gavin Andresen was critical about some specific issue implementing a cryptonote protocol, but can't find the remark with ease, so I'll look for it another time and post it if I find it.
Here's some good places to do your own research that aren't overly techie (high word to math ratio):
https://forum.getmonero.org/1/news-announcements-and-editorials/209/editorial-what-s-so-special-about-monero
https://news.ycombinator.com/item?id=7765455
http://bitcoin.stackexchange.com/questions/29471/is-there-any-true-anonymous-cryptocurrencies