User blog comment:Eleanor S. Lamb/(NX RARE OF THE WEEK) M417 SB ROCKS/@comment-5093628-20140209205742/@comment-24310201-20140209231110

Incite, the TAU's accuracy upgrade is different from the regular SB's upgrade. That's why when you upgrade the regular SB's accuracy, the recoil goes haywire and it's 10 times harder to tap-fire. The TAU's upgrade makes it easier to use and overall, improves upon the tap-fire. Those are the differences. I've used both for a relatively extended amount of time, so I should know what i'm talking about.