Quote (x]FoRsaKeN[x @ 6 Mar 2013 18:49)
I haven't played in awhile, but if I remember correctly, a noise suppressor will get rid of any amp or cable noise/buzz, and the TU-2 Bypass only got rid of guitar noise.
Tu-2 mutes the signal completely, to allow you tuning your guitar correctly.
NS-2 will get rid of noise, you set it to your preference, you can have it be highly sensitive, or less..