Agree with Randy,
I heard the L1P uses R binned lux 1. If so, and you running your TWOH at the same current L1P drive its R lux, you wont see minimally difference, if any. heck, you might even get dimmer output, or worse color, since the WO bin is rated at 700 mA drive, not the drive current the L1P is giving out.
If however, you gonna change the circuit to say like, 700 mA output, then it would be more feasible to go with TWOH. Even then, the advantage might not be THAT noticeable. Afterall, IIRC, overdriven R is closing to T bin lux III.
just my penny