This shot is making me think of the Prometheus cannon.
Am I the only one who thinks that having two different Proms (or three, if the PromR is still in R2) that behave exactly (or nearly) the same is more "realistic"? Sure, maybe the two Proms are nearly identical performance-wise, but perhaps the mounting points on the EA variants are specific to the EA ships and vice versa? Can't use an EA Prom on a GTVA fighter?
Or does the EA improve their Prom, while the GTVA sticks to the "tried and true" theorem and stuff... but I can't imagine the EA giving it a whole new name altogether, since the Prom is pretty much a proven weapon with every side (bar the Shivans). The most is maybe they'd keep the Prom name, and give it a "MkII" or an "Adv" tag. Like in R1, maybe EA gets PromO and Prom Adv, but GTVA side bears with PromR's and PromSes?
"EAW-xxx Advanced Prometheus" and "GTW-xxx Prometheus S", or stuff... bleh... I hope I'm making sense with the post...

The little confusing bits all caused by the Sol-Delta Sepentis node getting sealed off for several decades...
