http://www.dakkadakka.com/dakkaforum/posts/list/14.page JForum - http://www.jforum.net
I can't point out which one I feel is better because I haven't played them yet. I just gathered some pros and cons.

Stormboyz pros:
-very fast movement
-deep strike with zagstruk
-assault after deep strike
-and related to the previous one zagstruks power weapon in that assault

Stormboyz cons:
-many possibilities of death (each movement, assaulting after deep strike)
-no special weapons

Kommandos pros:
-special weapons
-snikrots ambush
-snikrots re-rolls

Kommandos cons:
-slower movement
-ambush can't always get you percisely where you need it

How do these pros and cons work in battles i seriously don't know. So I'm curious what do the veterans have to say ]]> http://www.dakkadakka.com/dakkaforum/posts/preList/229367/551196.page http://www.dakkadakka.com/dakkaforum/posts/preList/229367/551196.page GMT
kommandos can ambush, but once they have, they are sitting ducks, your paying 10 points per ork as a sacrifice for a single attack, as once you ambush a unit, you will either be brought down in CC (slowly) or shot to death.

stormboyz are a little more expensive (2 more points :O)
but thier extra movement helps alot, then can fly into a combat, kill a unit, then run off and hide behind cover.
ok, so you may lose a few on landings, but thats the ork way of life.
also, dont have to worry about them running off as zag will execute one to stay in the fight

all in all, i'd take a nice large unit of stormboyz, high movement, early assults and dont have to worry about being able to get out of the LOS quick enough.

Edit: spelling.]]> http://www.dakkadakka.com/dakkaforum/posts/preList/229367/551204.page http://www.dakkadakka.com/dakkaforum/posts/preList/229367/551204.page GMT
If I had to choose one or the other, it would probably be kommandos. My army is equipped to deal with most anything, but those rear gunners tear them apart.]]> http://www.dakkadakka.com/dakkaforum/posts/preList/229367/551364.page http://www.dakkadakka.com/dakkaforum/posts/preList/229367/551364.page GMT http://www.dakkadakka.com/dakkaforum/posts/preList/229367/551596.page http://www.dakkadakka.com/dakkaforum/posts/preList/229367/551596.page GMT