According to some reports I read, the Canon EF-S 18-55mm f/3.5-5.6 IS STM is reported to have a better IQ (Image Quality [which stems from the optical quality]) than the EF-S 18-135mm f/3.5-5.6 IS STM.


  1. To what degree the IQ differences are noticeable in shooting videos?


  1. Is there any difference in focusing speed and accuracy between those 2 lenses?