Both very good units, but you have to make the choice everytime you make the box. Which do you prefer your insane pyromaniacs or you deafening anti-tank?
I would STRONGLY advise against using Burnas in melee.I like Burnas, but I don't play Orks, so my advice is pointless.
Just gotta keep in mind that they serve a dual purpose, anti-infantry vomit of death, and rather effective anti-MEQ melee.
I think you meant dis-advise.I would STRONGLY advise using Burnas in melee.
Striking at lower inititive means that you will lose a few models before striking back, which at 15 points a piece is a quite expensive loss.
And then you have the problem of only getting 2 attacks each back.
All this with a squad cap of 15 and assault starts looking like a quite expensive mistake.
Always keep them in a Battlewagon at all times where possible.
If it gets wrecked and they bail out, then dump a unit of your Boyz out and into combat, and get your Burnas to embark in the Boyz Battlewagon.
The cost of a marine and the fragility of an Ork, you want the best protection possible.
Same rules apply for Burnas as a Big Mek with a KFF.