UMTS x LTE Noise Floor

Hello guys.
One quick question.

Why the noise floor for UMTS is -107 dBm while in LTE can be as low as -118 dBm?

It depends on band and bandwidth.

LTE FDD, and UMTS in B2 PCS 1900.
LTE Bandwidth 20 MHz

I believe it has to do with UMTS being Code Division, and LTE Frequency Division.