I've not tried Manchurian, but i have a Duke 3 in 2 band super and its a pretty incredible brush and does everything just right for me. I believe the Manchurian will have slightly thicker hairs than the silvertip and will likely feel "scrubbier" with greater backbone compared to the super. With super, you'll have a more luxurious, softer face feel, easier splay, and probably a little less backbone compared to Manchurian. I doubt you can wrong wrong with either brush, but you'll have to know exactly what feeling you're after to decide. The Manchurian will probably cost a bit more than the super.Any reason to take 2-band super over Manchurian?
What don't you like about Manchurian? Would that apply to 2-band super as well?
I also enjoy my Duke 3 in Best quite a bit- very different hair than 2 band super, but soft/scrubbier and less backbone. Still a great brush.