As I mentioned back in my Titans Return Brainstorm blogpost, Blurr is that toy's original tooling. Subtract Brainstorm's wings and substitute in a different hood for the vehicle mode, and you've got Blurr. It works a little better as Blurr, partially because it was obviously designed as him first, and secondly because... well, it's an open-top canopy, and Blurr isn't a spaceship.
When we first saw this toy, I wasn't sure I was gonna get it. I have a Blurr toy from back in the 2010 Generations toy, which was a retool of Drift, but the colors were a nice set of contrasting blues. But Hasbro decided to make their Blurr a solid teal color? Don't get me wrong, I love teal, but I'd also like another color in there. Like, a color #2 would be great.
Anyway, TakaraTomy later showed off theirs, and it had multiple colors, and then I was sold. It also helps that Brainstorm is a pretty fun toy with an interesting transformation, and, y'know, Blurr is mostly that same toy. Good colors on a good toy is good!
I think my favorite thing about Blurr is his little antenna on top of his head. (You know, the head that becomes a tiny robot that can ride inside him.) You can yank that up so the antenna rests higher on the noggin. It's an extra transformation step for such a tiny dude/head, and I appreciate it.
And, sure, there were times when you didn't have the speed-talking gimmick. There were your few pre-Furman Marvel comics speaking roles. There was, uh, All Hail Megatron. The sad thing that I learned is that Blurr needs his speed-talking gimmick. He's super boring and unexceptional without it. It's all he has. Blurr's problem is what makes him remarkable is also what makes him annoying. He's an incredibly superficial character.
Which is why (gasp) I am going to go out on a limb and say that I like Drift's character more than Blurr's. So, yes, you might believe that Drift is the worst kind of Marty Stu, being some kind of magical sword guy who shows up just to be righter about everything than everyone else, with a dark, scandalous past and godlike training from a secret Mary Suetopia which he discovered... but at least he's not That Guy Who Talks Fast. It's way more fun to hate Drift than it is to love Blurr.
Watch for paint-scratches on the hood.
Thus part of my problem ranking Blurr's toy versus Drift's. As you can see, one is a retool of the other. Blurr has a new head (based on his IDW comics design), a large gun and two handguns instead of a large sword and two ... handswords?, and a different spoiler. And despite being a less interesting character to me, he's much, much, muuuuuch prettier. Drift's colors are pretty boring. He's solid white and dark gray, with some tiny bits of red. Blurr, instead of being solid white, has this vivid range of blues. The only non-blue non-black color on him is the red for his knees and his chest symbol. He's not solid blue. He's multi-blue. And they're very good blues.
1986 Autobot Cars REPRESENT!
I probably stared at Blurr the most of all the toys in Hasbro's BotCon 2010 display cases.
Blurr's guns work real hard to out-cool Drift's swords. Blurr has a huge gun, of course, just like Drift had the huge sword, and it's a huger gun than Drift's sword. It also has a fold-out peg in the middle of the barrel so that Blurr can hold the gun two-handed. What you can do with Blurr's two handguns is pretty neat. Yeah, they still store in the hip holsters, just like Drift's mini-swords did, and Blurr can run around carrying them individually while the big gun's snapped onto his back... but you can also clip them onto the end of the barrel of the larger gun. If you face them barrel-forward, you end up with a three-pronged supergun. If you face them barrel backwards, you end up with a tripod for the larger gun. A tripod! You know, for all your crouching and waiting snipery needs.
He has a gun tripod MADE OUT OF GUNS.
And yet is it cooler than swords? I dunno. That's a tough call. Sure, lots of characters come with bunches of guns, but who the heck comes with a veritable golf bag of blades? However, these blades don't combine like Blurr's guns do. And Blurr is prettier than Drift, hands down, but Blurr-the-character just isn't that interesting to me. You can't even ironically own Blurr's toy like you can ironically own Drift's toy.
People ask, which of the two should they get? I answer... fuck me if I know!
Hey, more Titans who are Returning! The Transformer Who Was Voiced By That MicroMachines Guy doesn't really strike me as any sort of "titan," really, but here he is anyway, being a Titan and being Returning. 
Anyway, TakaraTomy later showed off theirs, and it had multiple colors, and then I was sold. It also helps that Brainstorm is a pretty fun toy with an interesting transformation, and, y'know, Blurr is mostly that same toy. Good colors on a good toy is good! 
