Any chance you could weigh him? Just curiosity mainly, I have serama roosters both larger and smaller than my OEGB roos. Although there are tons of OEGB varieties, seramas come in more random colors, and have shorter legs usually, so I'm going with serama. His back also looks shorter than OEGBs.
Plier spur removal is much easier than it seems. It's nice to have a helper hold the bird. Hold his leg out straight toward you, grasp the spur close to the base with pliers. Don't squeeze too hard, just enough to hold it. And gently twist just barely, up close to the leg. You will feel a slight snap when the outer sheath breaks loose where it joins the leg. Just slide it out away from his leg, leaving a soft stub underneath. The stub will harden in a few days, creating a new, but much smaller, stubby spur.
There's a good video on YouTube. Bleeding is possible, but done correctly should be minimal. But be prepared for a little anyway.