In terms of game design there seems to be an emphasis with Insurgents on firepower and with Security on handling, sort of like the Counter-Strike arsenal.
In terms of real-life equivalents I'm not an expert either but I think the FAL usually has a few inches more barrel length which would give it better velocity; 21" FAL vs 13-20" on the SCAR. They have the same gas piston action and fire the same cartridge, so in terms of ballistics I don't think the SCAR is much more "modern." Its main advance is its high modularity: the SCAR can undergo barrel changes to chamber 5.56 and the Picatinny rail system makes it much easier to use attachments. Even with the slight difference in velocity you would be very dead if you got shot by either gun.
TL;DR: shooty bang bang is the same, furniture is different.
Thank you very much for your insights gents! I was thinking about barrel length before but I thought maybe the internals would be different...
I tend to play a SCAR in kind of a light breacher role, does the shorter barrel have any actual advantage in CQC? Not meaning the SCAR in particular, but guns overall? Is there a mechanic for that?
T'was my trusty SCAR. Have made bad experiences though with both marksman rifles seemingly not one or two hitting reliably, though it was before today's patch.
On the same note, I don't really play assault rifles currently as they feel the weakest compared to Ins2, especially if played side by side. Also I find it much more easy to count my shots for magazine management when tapshooting.