[Kohnodude]

For a long time D'Addario had the most consistant strings, so i've only ever used those and the extra hard tension (J44) for several reasons. Provided your guitar's string height is not so low as to reduce the strings vibrations, the higher tension strings will allow you to transfer more energy into the soundboard (play harder), causing it to produce a richer, louder sound. Lower tensions strings will tend to produce a "splat" sound when you try to increase the volume, much the same way they do if you lower the tuning a half step or more. The scale length and fret size are as much or more of a factor as the string tension in ease of playing.