Long story short: I have both set to 440hz, and they tell me different things. Which one is right? When having tuned perfectly with the Guitar Rig tuner, the TU2 tells me it's a bit (1-2 dots) sharp.

The TU2 tuning sounds better to my ears when playing with outher music, but that could still just be that I'm so used to it, because I've been tuning with it forever.

So, which one is right?