I only have an L1T RB80.
The spill is similar in brightness but smoother more even than L0D CE/10440.
The hotspot of the L1T is brighter in the center. It gradually dims at the edges for a smooth transition to the spill unlike the L0D CE which is even all the way across then steps down to the spill.
With an L2D RB100 you will be getting 175 lumens instead of the L1T's 90 lumens so will get a noticeable increase in brightness.