It depends on a lot of factors, really. Many of these Rokhs will be smartbomb fits, but I don't think numbers as massive as these ( 45k vs 17k ) can be discarded as easy.
The new Megathron might outperform the new Rokh (EHP differences will be smaller) but at the moment it really looks like someone's put a bit of thought into that.
Now, without having BS pvp experience I'd say that for any big clusterfuck brawl I'd favor range and ehp over raw dps or tracking. Because my personal piloting skills suck so much ass that I can't outmaneuver being primaried by 20 guys in point blank range. I also hate sitting on theoretical awesome dps and still have to move into range between each primary. possibly wasting potential. Smaller scale and it's vastly different.
In small gang warfare, you are either on top of the enemy, or you aren't. If you are, the tracking bonus of the Megathron is much more important, since large blasters still miss easily. If you aren't, a Rokh is much less effective than an Armageddon. I'm not saying that a Rokh won't outperform a Megathron in regards to range in the 15-30 km range - of course it will. But that doesn't matter, because an Armageddon, an Abaddon, and many other ships will also outdo both in that situation. So, if you are going to be close, take a Megathron. If you are going to possibly be further away, use an Armageddon or Abaddon. Under no circumstance is the Rokh the best choice, or even second best. And EHP doesn't really matter, because the Rokh's tank is not better than the Megathron's by much, if any, and pales in comparison to that managed by Amarrian BS's.
In regards to sniping, the Rokh can reach out to 249 km. Problem is, almost no one fights or snipes at that range, AND if someone gets close to a Rokh in that situation, it's dead. OTOH, the Megathron has better tracking, can still fit to hit out very far, and can also carry a lot more in terms of defense and drones. But, actually, the current Apoc is a much better sniper than either in terms of range + dps.
So, in other words, the Rokh, well-used or not, is not a good combat ship in comparison to its competitors.