I am using SPDIF , output 5 , 6 and 5+6 for recording , two mono outputs for main out ,plus monitor output for my real amp and cab .
When I engage all of them in the same time , studio PC monitors, QSC's and Mesa cab it sound astonishing !
All of 3 sounds are good on its own way , but still different to each other , which is normal .
Recording sound with SPDIF is the best , I've tried analogue , mic ,etc, but SPDIF simoly blew all the rest of recording setups away.
I am using Scarlet as well , btw .
Scarlet is fantastic sound card for given price , and its going very well with Logic .