Assuming this isn't a parody thread of the recent SKS SHTF fapping...
The SKS is a milsurp rifle. They were made in the Cold War, stored, some were brought out for service, then sold as surplus here. The SKS saw service from the Battle of Berlin in 1945 up until recently in places like the Balkans. The SKS was a gun designed around 1943 to 1945 and it shows - the Russians got rid of the SKS as soon as they smoothed out production issues with the AK. Other countries like the PRC and Yugoslavia kept making the SKS for export and stockpiling in the event of WW3.
AKs on today's market aren't usually milsurps. They're made with US customers in mind and have been since the first ones arrived in the 1970s and 1980s. Parts kits builds are a different story and I don't think that's what OP wants.
In pretty much every way, the AK is better. I would rather collect AKs. I would rather use an AK defensively over an SKS. I would rather hunt with an AK over a SKS. The only advantage the SKS has is that they're cheaper to buy.
Even in Mass, a regular AK is a better option in every way. Want a pre-1989 or 1994 gun? AK. Want pre-1994 mags? AK. Want to mount optics? AK. Want to collect old guns? AK parts kit builds and pre-1989 guns.