Raku II is just a bit different than Raku. The colors seems to be a bit more intense with less browns. Raku II produces a mix of blues, greens, purples, and browns. This color can change a bit according to how it is treated in the flame, but also seems to just have a mind of its own also.
Shown here in a matte finish.
The 1.5 mm hole will produce a more rounded shaped bead, whereas the 2.5 mm hole will be more donut shaped.
You can choose from 8, 9, or 10 mm beads with a 1.5 or 2.5 mm hole.