spas is still better than the ksg in my book.  They gave the spas a pretty good buff at range, the stats don't say so but You can 2 hit a guy at max range almost every time with damage proficiency, for that to happen with 7 damage per pellet both those shots would need to land 100% of the pellets to get a 2 hit kill.  Im guessing the damage profile on the spas is now 49-21 with damage proficiency on.  That still gives it more damage in all of the ksg's range and they have the same spread size.  My ranking is

1. usas12- medium fire rate high power up close

2. 1887- high power in all of its range, less acurate spread

3. spas- medium power at all ranges tight spread

4.striker- spam

5.ksg- high power up close, lower range and rate of fire

6.aa12-range of a sword

I've been running the USAS and no like 9/10 i'm dropping the striker whores  when we meet up

USAS = takes out more enemies in CQC engagements faster.
KSG = Take out one guy as effectively or more effectively (by a small margin). HUGE ammo capacity. Extended Mags was pre-built into this gun. 90% of the time you will respawn before you can fully empty your mags.

KSG is very hard to play with, with all the lag comp.

Most of your time the bullets roll right off the other team. Very frustrating...

USAS with range is my favorite by far even over the striker with damage or range. The USAS gets me more consistent ohk at range or in close