I have had an mini BK 180 for a long time, it is a great skimmer. I'm not familiar with the SuperMarin but I recently bought a Double Cone 150 and did not like it as much as my mini BK and sold it.
I like that the collection cup lifts right off the mini BK when you want to empty it. The cup on the Double Cone was threaded onto the base and had to be unscrewed to dump it out (plus there was a drain tube attached to the cup that made it hard to unscrew). The collection cup on the DC 160 was smaller than the one on the mini BK 180 and would need to be emptied more often. The main hassle with the mini BK is that the pump is located inside the skimmer so you have to take the whole thing apart to service the pump, which also means taking the whole skimmer out of the sump. Its really not too bad once you get the hang of it (as long as you have enough room to get it in and out of your sump) but it is a process.
My mini BK 180 seems to be well sized for my 112 gallon system. I think you would be fine with the mini BK 200 if you are willing to take the whole thing out of the sump for servicing the pump. It appears to have a bigger collection cup than the SuperMarin 160 too which I think you'd appreciate (though perhaps not an issue if you plan to connect it to an external collection container).