I have literally spent a day's worth of time reading about the differences between these two pedals. Lots of people claim to be happy with either. There is is no "wrong" answer it seems between these two. I have an Empress. I have a Diamond on the way. I have a Mesa Walkabout Scout that I love for its fat, tubey, warm goodness. I also use Darkglass effects for my OD and dirt needs. Based on my setup, what do you think? Will the Diamond add alittle something special even with it's limited control? Or will I miss the transparency and precise control (read: metered LED display) of the Empress? I play mostly alt & hard rock but throw other stuff in the mix now and then too.