Whats the effective difference?
You have an alien behind some cover, you can either overwatch him and if he moves you get to fire at him - if he fires, overwatch wont do anything (as seen in demo, sniper vs sectoid)
If you have suppressing fire on him and he moves, I think you get a shot at him (not seen in demo) - but what happens if he fires at you, less effective accuracy? (seen in demo, gas pump hit instead[?] of Support unit)
Obviously a sniper cant lay down suppressing fire, only the Heavy and Support (tough in a lesser version). So actually my question only refers to these 2 character classes as they are the only classes that theoretically can do both - why would you choose suppressing fire over overwatch, or vice versa?
Maybe Heavys and Supports can't overwatch? Not sure that makes much sense / too gamey.
Do we know if overwatch can only shoot at one target like the original? Also we know that suppressing fire goes thru ammo at twice the rate before you need to reload... so there will be at least that drawback.
Sorry in advance for all the ( brackets )