The difference is $1000. If you need a mixer that can save set ups and has all the EFX built in and can act as a computer interface the Mod II is the way to go. Either way you will only have about $7oo invested as they are selling used for about $500-700 less than new.

The Mod II has offset speakers in the towers as well increasing the lateral range a bit.

The Mod II also takes up A LOT less space as the base on the Mod I is huge and heavier.

The Tone Match module is worth the price of admission in our opinion.