Default [Q] Linaro vs. SaberMod

So, this is something I've been trying to find an answer for, here and elsewhere, but found nothing conclusive:

Between Linaro and SaberMod toolchains, which one produces faster / more optimized binaries? I'm aware of Linaro's improvements over the standard Google toolchain, but it's not clear if SaberMod also follows the same line, and which one should be better regarding binary performance.