[nathan_hui]

It really depends on the final gearing that you want. Live axle usually means faster, less torque, and less backlash. Dead axle usually means slower, more torque, and more backlash. The type of drivetrain usually doesn't directly drive the selection of live axle vs. dead axle - the type of drivetrain combined with the chassis design combined with the final expected performance does.

If you could tell us a bit more about the drivetrain you want to build, we can give you more advice. Otherwise, there's really not much we can tell you. Each design is specific to its application.