The M3 Lava cuts awesome with sharp chisels and have no problems with tapping the threads. It cuts easier than the M3 Metals (IMO). For acrylic Acetate compared Lava, definitely a difference but if you don't have any problems with AA you shouldn't have it with the Lava. The Mokume Gane lava blanks cut easier than the M3 Metal Mokume Gane counter parts.
Which are:
Black Lava
Red Lava
Black Lava & Gold Bronze
Black Lava & White Aluminum
Black Lava & Red Copper
Black Lava & Cobaltium
Red Lava & Gold Bronze
Red Lava & Blue Bronze
There are a few others but just can't think of them off the top of my head.
Rick