Heat: 8
Damage: 8
Range: 15 (450m)
Weight: 5 Tons
Critical Slots: 2
And the specifications for the PPC-
Heat: 10
Damage: 10
Range: 18 (540m)
Weight: 7 Tons
Critical Slots: 3
The differences seem negligible at first glance. But on the breakdown you are gaining 2 damage and 90m of range for the cost of 2 heat per shot and 2 tons and a crit space. Considering that 2 tons (and an extra crit space) can be used to even further offset the heat cost (making it 6 heat for 8 damage vs 10 for 10 at the same tonnage) the only consideration becomes range.
90m extra range is debatable. It will make a difference, but will the number of times it becomes a critical factor offset the inefficiencies of the PPC? It's hard to draw any other conclusion except Large lasers are more efficient than PPC when it comes to putting out damage. Of course, this is just from looking at the weapon specs.
There are however, other considerations that we don't know about yet that could flip the balance.
The most obvious one is targeting mechanics. The Large Laser, like all lasers, has a "burn time" for the damage to be applied to a specific section of the target. The PPC on the other hand, appears from some accounts to be a bolt style weapon and may do all of it's damage in one spot. The question then becomes one of gunnery skill. If you have the skill to "burn" the majority of your laser shot in the same spot, the Large Laser still wins on efficiency. But it does come at the cost of pilot distraction.
The other unknown is recycle time. I have been unable to find any information on recycle times for PPC or Large Laser. From the general trend one could assume that Large Lasers will recycle faster, but that is still an assumption. I have no idea for example how MUCH faster the Large Laser might Recycle for example (if at all).
And there are other imponderables. There is the possibility of EMP style effects from a PPC hit. (addendum - ok it is cannon but it's multiple strikes- probably way overdone in previous titles) It's traditional but not cannon. The PPC by canon has a minimum range of 90m, but that may not be implemented. By canon the PPC causes recoil in the firing mech like an AC, but I haven't heard anything about recoil firing effects. And on and on. These are things that we likely won't know until final release.
ADDENDUM: Bluten pointed out below that there may possibly be a difference in the number of Hardpoint slots a PPC takes up vs a Large Laser. - specifically 2 for a PPC and 1 for a large Laser. But that's also speculative. And possibly incorrect due to confusion about terminology. (hardpoint slots =/= critical slots)
Still all in all it looks encouraging for the large Laser. In past Mechwarrior titles there was absolutely no reason to use a Large Laser instead of a PPC because of the mechanics of the game. This time around I think I will be at least seriously trying them instead of the PPC.
Edited by Xandre Blackheart, 08 July 2012 - 01:01 PM.