Basilisk II is by the same author as ShapeShifter. It was meant to be cross platform where ShapeShifter was Amiga only. The 68k version never worked very well and has plenty of bugs with few useful feature additions. It doesn't even fully work on my Amiga. Fusion is good and has some nice features but a few minor bugs too. ShapeShifter has the least bugs and most support. It's more polished than the other choices. Save yourself some time and take Cammy's advice.