Mitchell 306 vs 306-S

[cbar45]

Hello all,

I'm quite familiar with the spartan-like build of the 306, but was wondering how the 306-S compares?

Couldn't find a schematic, but 306-S photos show a side-plate that reads "Ball Bearing"; I take it that's a pinion bearing vs a bushing in the 306?

Any differences in the drag system or are they the same? Is one reel more preferable than the other?

Any info is appreciated. Thanks!