The glass tube of Fogger V6 is longer than V5. V6's logo is etched to the bottom.
removeable top cap
Top refill holes are same, the bigger hole is the filling hole (No screw needed, additional air intake hole in the opposite direction to prevent flooding created by pressure, which normally will happen for other top filling atomizers)
Same size glass tube
V6 comes with bigger chimney(dia.16mm)
New coil desk for V6 (looks like Orchid's desk)
Same copper 510 adjustabe pin. V6 comes with ball bearing airflow control(like Atlantis）