its just the physical size of the pot. no real differance.
Quote by Scowmoo

You deserved this, Matt.
but which one will fit regular knobs? is the shaft size the same? i just want to make sure it will fit regular knobs.


the "DRIVE" pot on the schem. 1k L - the L means linear right? and what does N.C. mean at the 1st lug of the pot?
The shafts should be the same size. Sometimes the larger pot may not fit if your trying to fit 3 in a small enclosure. The N.C. means no connection as in no wire connected to that lug.