hi sunshowers! you know, i'm in exactly the same boat as you. don't take notes and reviews on this site too seriously, as scent is so subjective... and i can dislike or like a scent i own based solely on my mood. smell is a very primitive scent, and i find it ties in strongly to emotions. you can like something and find the exact same notes in something else but completely detest it.
i think in the case of the allure homme sport - which i have tried and quite enjoy - you're probably stressing and second-guessing your purchase choice so much that you're over-analysing. for a safe, masculine cologne with character, i think you've done extremely well! the true test will be how your boyfriend likes it!
anyway, best of luck - my only advice is to trust your nose. as you're exposed to more scents you find fimilar traits and eventually put names to the actual notes, but at the end of the day... just go with what smells good
ps: i share your opinion of coco mademoiselle vs chance.