1 great album vs 8 great and some flawless ones. Maybe if the ratio was remotely close some kind of comparison could be made. I don't love focus anywhere near any of the Opeth releases anyway tbh and imo in terms of metal Mike is a far better song writer than pretty much anyone within metal. So no comparison can really be made at all. Mike...no contest. It's like Mike vs Fredrik Thordendal as a solo artist, while Sol Niger within is amazing, its only one release, although that does compare with some of Opeth's albums imo.