Takumar vs Super Takumar ??

[Jerry in Arizona]

I am thinking of acquiring some older M42 prime lenses to use on my K20D.  I 
seem to remember that the Super Takumars were considered a step back in quality 
and optics from the Takumars.  Can anyone confirm or deny this?  Have not 
decided which lengths to focus on, prob just on what is available and what I can 
afford.  Anything else I should watch for, like coatings?

Jerry