A very good question, I would also be very interested. I've heard that the original software is always better for solo mining in the ckpool. The Brain OS software keeps 2.5% of the mining hashrate for itself. This 2.5% fee, if you want to call it that, has to be received by Brain OS somehow, so this hashrate has to be redirected to the Brain OS pool or retained directly. This means that the miner must always switch the software between the two pools, i.e. from ckpool to Brain OS. However, this switching should not be so good, it may have a negative effect on the luck of finding a block, because he always has to switch back and forth. That's how I remember it, that's how I heard it once. Whether this is really the case, I don't know 100%. Maybe ck can say something about it. It would also be very interesting for me to know.