MOTM

This is cross posted to both the MOTM and Oakley lists.

I have been using the Spectrol 148-149 series of pots (as used in MOTM) 
for my DIY modules.   The 248-249 series (Mouser catalog page 406) pots 
have almost identical specs, yet are about 3/4 the price.  The 248-249 
series are physically smaller (.3" body depth vs .45").

It isn't clear from the specs in the catalog what makes the 148-149 
series so much better.  Anybody know?

It appears that the 248-249 pots are physically compatible as far as the 
PCB pins location and could be substituted into a board designed for the 
148-149 series.  The reverse might not be the case, since the 248-249 
series are not as deep and a board designed for them might have other 
parts sitting closely behind that could interfere with the deeper body 
of the 148-149s.  Is this correct?

Thanks,

Richard Brewster