Trying to work out which mantle to fit can be a problem which is not helped by manufacturers using their own references and/or upgrading and re-naming Lamps. Add  to this the long history of Lamp production and its not suprising that people get confused.

Forget about the name look at the size

Pre-tied Soft Mantles fall into Two groups.

Single Tie & Double Tie

They are then Classified by Candle Power or Brightness

[C.P.]

Lamps using Double Tie Mantles usually have a rod rising from the centre of the base

The Rod in Single Tie Lamps goes up the side and then over in a Swan Neck.

There are variations to the above usually found in older lamps.

As a Rule of Thumb the Candle power [C.P.]

 is dictated by the Diameter of the Glass.

Up to 3 inch Dia  =  100/200 CP

Up to 5 inch Dia  = 300/500 CP

The above is only a Rule of Thumb Guide Manufacturers Guide lines should be observed when known