Yes, it makes a difference, with front suspension your wrist have to take less shocks than with a rigid bike.

I did ride a rigid MTB for two years, but i switched it for a full suspension because of backpain.
I noticed that i could ride longer and my arms where not as tired as they used to be!

Because your a commuter, i think rear suspension is not worth investing, because its only efficient on off road tracks.
Only the high end MTB`s have enough technology to block the "pumping" of the rear shock

But it`s a good plan to look for front suspension, i don`t know much about this brand, but i`m sure other members can tell more you about it.

My only suggestion is to invest in some descent front suspension or front suspension bike and get something good instead of low end fully!

Good luck and hope you can ride without trouble,