There are two top boar brushes in my rotation. They are the Semogue Owners Club, aka the SOC, and the Omega 21762, aka the Italian Flag or R&B brush.
The SOC has amazing soft tips once it's broken in, but it probably has the longest break in time of all boar brushes. Think at least 3 months of daily use. During the break in period the lather building can be troublesome. Don't give up! You will be rewarded with the softest feeling brush.
One thing to note is the base of the knot is very dense and thick and the top thins out to nice small soft tips. This causes the brush to have a huge bloom or spread. Not a bad thing, but just to keep in mind. My Omega boar brushes don't do this. The tips of the brush will also have a matted hair look, this is also due to the tips being so small and soft. Don't worry about this. Again this is different than my Omega boars which are much more orderly.
The handle on the SOC is amazing and is really beautiful, has a nice wood grain pattern. Really good feel in the hand. Good heft to it too. This is not a cheap feeling boar brush. A little lighter and smaller than the Omega 21762, but just as good.
So which brush do I like more? The SOC or the Omega 21762? I can't say, I love both. Maybe the tips of the SOC are a bit softer but the lighter backbone of the Omega 21762 is a bit more luxurious. If you are a boar brush love, just get both. I am glad I did.