Ah, ah, interesting question.
Yes, I've owned both. Both sounded great, but slightly different. The GR was very neutral, very detailed and articulate, almost "hi-fi" and didn't lack low end at all. The Barefaced had the same qualities, plus a little extra "oh my god this is soooo good" ompf that I became addicted to, so I ended-up selling the GR when I have noticed that after one year, each time I had to choose one I took the Barefaced. I'm not saying it sounds better, only that I prefered it, your opinion may differ.
Regarding the weight, the GR was slightly lighter than the BF, but it wasn't night and day, and I was able to take any of them to a gig using the public transports (I have no car, not even a driving license

).
I wrote a post about these 2 cabs, initially it was a rant about how GR Bass exagerate their specs. Well, they are equaly loud, even if GR Bass claims higher sensitivity.
I have these 2 cabs that I love equaly: Barefaced Super Compact (1x12) and GR Bass NF210V.
Both are super lightweight and have a great sound: loud, uncolored, detailed, great low end…
But I was intrigued, because in theory, the GR Bass 210 (sensitivity 103 dB) is supposed to be significantly more efficient than the Barefaced 1x12 (sensitivity 97 dB).
I didn't think there was such a big difference, so I made this little experience: I sent the same bass line with the same amp and same settings to each cab and I measured the loudness with a dB meter app on my smartphone.
But...
Both great souding cabs, lightweight and loud. It's a matter of personal taste.
Another difference is that GR Bass Carbon Fiber are lightweight at the expense of a pretty fragile structure, whearas the Barefaced are really rock solid, like you could litterally throw them down a truck without harming them.