Many other people have already pointed out how the edge interaction with attacks is broken at its core and does not meaningfully matter for weapon choice.
Like sorry but no. Edge is not really relevant in weapon choice for the same reason defense rating ware is worthless.
No one cares about edge.
Oof.
I would say in theory that could be a method of making weapons feel different but A: Basic mods make you ignore this mechanic entirely, and B: Basic corpsec has a DR of 6. AR rating varies from 10-11, and you can slap a smartgun system on it for a +2, capping out at 13. BF reduces this by 4. So your ranging from 9 (which is not enough to gain edge) to 6 (not enough to lose edge) when burst firing. You could single shot but your trading 2 DV for an edge and that is... a bad deal in most cases especially with the edge gain limit. Like getting the chance to AOE the entire fight is amazing but not worth losing 8 DV over a combat to get the 4 edge. Also, I doubt anticipation will cost 4 edge (or any edge you can start a fight with) for much longer due to how insanely overtuned and broken it is. Like in terms of 'edge breakpoints' the only one that matters is starting with 4 to get Anticipation off at the start of every combat for some A team firing.
Meanwhile, the MP caps out at 9 for the same range category ARs fire best in, and fires BETTER at close range than ARs. So, weirdly, when it comes to not giving your opponents edge, ARs are... worse than machine pistols? Like yeah you can't fire at all on the megahuge range brackets but at the 3rd one they aren't much worse than ARs, at the 2nd hardly at all, and at the first they are so comically better.
But either way, lets assume your firing at the 3rd, the one where MPs are the worst. Black scorpions fire with 8 at those ranges, bumped to 10 for a smartgun. You therefore go down to 6, and, again, don't give or take edge from corpsec. You also are only 3 below ARs, so anyone wearing armor with 'ware, like the elite corpsec statlines, are going to take an imaging scope from you to not give edge to anyway, and both MPs and ARs can take those.
So like... no. Edge does not matter here. You never are gaining or losing edge when attacking vs most targets in the game because the math on edge is very VERY silly. But it makes sense because if you made the math closer (Like if edge varied by 2 points) you create really weird unfun 'breakpoint math' that make the system fiendishly complex for your players because figuring out optimal body+armor ratios would be A Thing, which is the opposite of this system's goal. Ironically, Edge is either always going to essentially be irrelevant for choosing weapons, or its going to be so complex that it is significantly worse than modifiers were, because the math for those was completely internal and very simple and didn't involve a secondary stat that had nothing to do with your attack and defense rolls.