Soundlab A-3 vs M-2 - sonic differences ? thanks

Hi ! Had a chance to heard a 2nd hand A-3and remained very impressed.
In alternative could afford a new pair of M-3. How much will I loose versus the A-3 that I heard ?
Main differences ?
You may want to pose this question to the SLOG website. I am sure they can answer your questions.
m3 is designed to operate in conjunction with an external subwoofer and is a full range design; ie, it only goes down to 80hz. You must have a dedicated woofer.