I have two Deus, one for wife and one for me. Both units have large and small coil. I use my large coil most if not all of the time...and love it. As some posts have mentioned above, I will back up with my own experience, and say with the small coil, I can hit a 12" quarter with very distinctive audible target acquisition...in most canned modes...canned relic stops you in your tracs. With the large coil, this same target screams...with coil few inches off the ground.
I've also a CTX, and have been giving serious thought on getting rid of a machine, extra Deus or CTX. I've been playin around in my back yard with each unit. I want to like/keep the CTX, but...I cannot...cannot hit my 12" quarter at all, and I suspect EMI problems. I've tried all auto settings, ground settings, audio settings, etc, but no joy. I'm pretty sure I can hit this target with manual, setting around 23 or higher, but, this setting on this machine is not realistic in my area...to noisy/erratic to detect with where the VID has targets jumping around all over the screen. I only mention this as when I run my Deus with small coil at same time of day on same target, I get the quarter in most canned modes, again, where relic offers no question.
Randy