According to the cross-spectrum technique (alog 25039), L1 has a different characteristic in noises from 40 to 200 Hz. No surprise.

While a H1 spectrum shows somewhat-feature-less 1/f noise with a sharp 60 Hz peak and its harmonics, L1 seems to have extra structures including a few broad bumps in 50-150 Hz. See the attached plot below.

I picked a GPS time of 1131307217 (Nov 11 2015 20:00:00 UTC) for the L1 spectrum. This is a period well before the L1 dropped the inspiral range and seemingly less non-stationary in 10-200 Hz. 

The ASD parameters are the same as those for H1 -- Hanning, 50% overlap, 1 Hz bandwidth for a 12 minutes data chunk. I used the DARM model of the L1 calibration group to calibrate the cross-spectrum. I have not corrected the time-varying parameters (i.e. kappas) for this analysis. I have not subtracted thermal noises.