From personal experience, when I went to my first jam, even though I had worked through the first three solos in BGU, I was soooo glad that I had gone through about half of SWS (that's about as far as I ever got in that one). When I first got up on stage and nerves took over, I auto-piloted to that 4 note pattern pretty hard. My second time up, I calmed down a bit and could play box 1 along with the 4 note pattern.
I've also heard what Griff has said about doing the first couple solos in BGU before doing SWS. From my own personal journey, when I started BGU, I actually worked it pretty hard for a few months to get past solo 2. Once I was there was when Griff released SWS. Since I had been so focused on BGU, it was a nice distraction for a little while. These days, if you want just a straight solo instead of another way to look at the fretboard, you could just as easily do 5EBS or 5MEBS. Those are a LOT of fun, and they get you playing something that you can plug in somewhere and sound really cool.
Long/short, I'd say that, if you just finished BBG, you should look at BGU with the caveat that, while you're working through it, you should look at SWS, 5EBS, or 5MEBS to break it up and have some fun shortly after you have the first couple of solos under your fingers.
