Don't have either one, so no direct experience to report. But I have had guns with Speedfeed magazine-type stocks, and don't like 'em, they only hold 2 rounds per side and that not reliably. Plus the rounds aren't as easy to get to as a Sidesaddle, and I like Sidesaddles.
Don't like ported barrels on 'serious' guns either, the gas/smoke between me and whatever is downrange I can do without. No, it's not directly in the line of sight but I still find it distracting.
I like the conventional Mossberg ghost rings OK, the Picatinny rail type sights I have on a FN SLP and the gun seems to be stocked for them, so they work OK too. I wouldn't pay extra for the rail if good ghost rings were available, because I'm not putting (even higher above the sight line) optics on a shotgun. I like dots on a carbine, but not on a shotgun, doesn't mean they don't work, but I'm not going there on a shotgun.
You had a good shotgun class yet? Buy a plain jane riot gun, used even, and spend the extra money on a good class before you buy a gussied-up shotgun NIB. Your skillset is more important than the gun...
Mindset - Skillset - Toolset. In that order!
Attitude and skill will get you through times of no gear, better than gear will get you through times of no attitude and no skill.