What are the differences between the Q330-270 and the Q330-271 springcages?

Q330-270- T Lock Spring Cage Kit (Inside for T411 and outside all functions except T101, T291, T301) and uses outside torque plate.  
Q330-271- T Lock Spring Cage Kit ( Inside-all functions except T411 and inside and outside for T101, T291,  T301) and uses inside torque plate. 

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