I have used LBX before on a Hunchback 4H, back then a couple years ago I preferred it since I was not good at aiming well. The LBX is a good beginner Ballistic due to its spread effect.
Now I am using a Hunchback 4G and switching between both of these weapons for comparison. Since using both, I have discovered the LBX still works better even though I have just as good an aim with the AC/10. I can score about 250+ damage with the AC/10 compared to 300+ with the LBX. So far at max, I can get into the 400s with the AC/10 but over 500 with the LBX. I wonder why the spread Autocannon works better, I would expect them to have roughly similar results.
Looking at this, first the LBX has better range.
LBX Range: 540; Max Range 1620
AC/10 Range: 450; Max Range: 1350
But due to spread, you get better damage closer in with the LBX since even with spread, the concentration on target would give better results. I usually do not fight much outside Range with either weapon. Even with a 90m difference, I would expect similar results, maybe a slight edge to the AC/10 since it does not spread.
Yet the LBX has the edge and I put some thought into why. The LBX is 1 less heat and 1 less critical slot but I do not see these as a cause for the damage difference either though the heat might allow more firings before pulling back to cool off. The LBX has a crit chance like a MG, I don't think that is a big deal. The LBX has a percent chance for additional damage that makes no sense but the percentages are low (higher than a MG but not game breaking) so I do not think they contribute much to what I see here.
I can come up with only 1 answer. The 1 ton difference between them. That 1 ton allows the LBX to carry 15 more shots for more damage while playing a match, even with spread a competent player can concentrate most of the pellet spread on target by firing more often at Range or less thus a LBX user gets more shots and a higher damage output not counting certain factors such as if killed and when.
Even my after match stats prove this to me, after a successful match I will have more damage and thus points & CBills from using LBX than a AC/10. Thus the AC/10s primary weakness is, to me, clear. This 1 ton difference makes a standard AC/10 less desirable than a LBX for use when the two should be even with the primary difference being single shot AC/10 vs spread LBX.
So the question comes to mind how to fix this. In the past year the LBX got buffed by having the spread reduced and fixed while the AC/10 recently got a projectile speed reduction. The 'nerf' did not really hurt the AC/10 in the hands of a competent player (still faster than a LBX shot anyway) while the 'buff' on the LBX helped it as it should. I do not think changing projectile speed on the AC/10 will do anything for this weakness between the 2 weapons.
I can only think of three things that could fix this problem.
Fix #1 - Up AC/10 damage per shot to maybe 10.5-11. I don't like front loaded damage but have to list this in honesty as an option. This would make ammo explosions more deadly and begs whether it throws off any balance between the AC/10 and other Autocannon.
Fix #2 - Increase the # of shots per ton for the AC/10 to say 22-23. This would give it a rough parity with the LBX by allowing as many shots within the same tons. But this is based off my HBK-4G and may not work on some other Mech based on amount of ammo used.
Fix #3 - Change the AC/10 weight to 11. This allows both to carry the same tons in ammo.
Maybe there is a solution I did not list. But there is a problem in my view and something needs changing so these 2 weapons have a rough comparison and similarity between them.
For reference,
here is the HBK-4G I am running that I noticed this on. You can swap the AC/10 + 2 tons ammo for a LBX + 3 tons ammo. I have something similar on my 4H where I normally carry a LBX + 2 tons ammo, with an AC/10 I could only fit 15 shots.
Thanks for reading if you got this far.