Reply to Turntable Output Question

I recently sold off my entire rig and went with two Stanton ST-150 turntables and a Kontrol Z2. And I absolutely love it. That said, I have a quick question in regards to the output signal of the TTs.

One of my tables has a noticeably louder output. This also shows up in the timecode signal meter in the calibration pane. Both of the tables work fine, and Traktor reads the timecode signal without issue. I'm just curious as to why one would be louder than the other. I can record the timecode signals if needed.

For those familiar with these particular turntables: No, I do not have one of them set to a line output signal. Both are on phono, and utilizing the internal ground. Basically, they're two identical tables, yet one puts out noticeably more signal. Why is this?