The answer is right here in the specs for both speakers.
Your M60 speaker SPL vs Freq
Your M80 speaker SPL vs Freq
At equal volume, the M80 will have a reach down to the 30~35hz that is the lower bass that you are looking for, where the M60 drops off at 38~40hz.
But has been said before, the speaker is 4ohm dropping down to the 3.2-3.5 at those lower frequencies. it will pull current from the amplifier that generates heat as the power supply has to keep up. What you are asking is a feat for any speaker. The Axiom M80, M80HP and M100 deliver on that bass request, but do it at a price. That is 4ohm impedance, and a high current demand from the Amp.
To get the lower bass sound it requires to move quite a bit of air. You can do this by using either a large 12" driver, or dual 8" or as Axiom has done, 2x6.5" + 2x5.25" drivers. A larger driver can move more air but is not as fast to changes in sound as multiple smaller drivers to do the same work. If you are looking for a tight bass then you will prefer multiple smaller drivers.
I knew a guy that use to supe up the old Volkswagon Beetles and run them at the local speadway as a crowd drawing novelty. He fit a 375hp engine into the back of the beetle and drag race them but it would blow the transmission after each run.
