Steve - for the most part, all of my blue roses are either fragrant to highly fragrant. I really don't find much of a difference in the scent. The headiest scented ones are definitely Intrigue (deep purple/red) and BlueGirl (bluest of 'em all). Blueberry Hill isn't all that fragrant, not like Angel Face. Enchanted Evening has a nice rose scent, Sterling Silver has more of a lemony scent, Stainless Steel is OK as far as scent. I honestly don't know about Blue Bayou.. I didn't bend down to take a whiff (too far to the ground & didn't want to cut one of them). Some of them are more heavenly than others.. but none are as sweet as, say, HoneySweet or Melody Perfume.
As far as the brown tips on my Blue Bayou and thrips, I have no idea. I don't know really what thrips are. I don't spray outside of the initial aphid time in the early spring, so I have no idea what's wrong with them. From what I just did in a quick 5 minute google search, looks like I may have them. Guess I'll get some Neem oil.