Fadal 15 has a spindle speed of

7500 RPM and a 7 HP Motor

Fadal 50-20 has a spindle speed of

 7500 RPM and a 15 HP Motor

     
     
Fadal 15 has a travel capacity of

16" X 20" X 20"

Fadal 50-20 has a travel capacity of

20" X 50" X 28"