on paper, the Micro 300 should be louder, 300 watts vs. 260 watts. the human ear shouldn't be able to detect any difference but I think the EA would have less distortion.
have you checked out the Genz-Benz Shuttle 3.0? it's less money than the EA (and yes, only one input). the Bass Place over in Tempe has both the EA and Genz. David, the manager told me that since the Shuttle 3.0 came out, hardly anyone buys the Micro 300.
I a/b'ed my Shuttle 3.0 with a bud's WTX-260 and a Epifani UL112 and we both agreed the Shuttle sounded real good, maybe not louder at the comparison volume which wasn't pushing the limit of either amp. the parametric mid on the Shuttle is handier for taming feedback with a urb. when pushed to the limit, I think the Eden would sound "softer" because it has protective limiting.