I've used both extensively and they both work fine. I prefer the S&B packaging as it's smaller than the Federal but really just go with what is the cheapest and most available. And if they are the same in that regard, just take your pick.
The S&B packaging is like the Fiocchi packaging - smaller, compact and can store more in my ammo tin when going to the range.
In my opinion, the performance yields and differences between all these brands are marginal at best. They all go bang in all my guns, but I will say a few things...and this is a small sample size so take this with a grain of salt...
I have had only a few dud rounds in my life and they all came from Federal Syntech rounds (2 from a 147gr, 1 from a 124gr) - but I have should thousands and thousands so maybe just hit on a bad batch, as well as Scorpio (more on this below)
Winchester white box 9mm was the absolutely dirtiest 9mm I have shot. Think it was 115gr if that matters, but the brass comes out like my steaks on the BBQ (super charred) and my guns get gummed up with more carbon.
I will avoid the Scorpio stuff. I know, I know, other people say no problem with it, but I have had duds, light primer strikes, feed and ejection issues, and accuracy is noticeably worse. No wonder some retailers have been trying to unload this stuff. I am not impressed. I think they are made by a division or S&B or same parent company, but doesn't matter - I was not impressed with Scorpio.
S&B, Fiocchi, Blazer and Federal / American Eagle all pretty much performed the same, for basic useability. Again, this is plinking and target shooting so hardly a focus on minute accuracy here.
Best overall round in my opinion is PMC Bronze. I will say that as a line, Bronze has been super in multiple calibers. I have never ever had a hiccup on any Bronze round in any caliber and they seem to group slightly better with 9mm from my guns (FX9, FPC currently, previously PC Carbine and Kriss Vector). My guns all are happy with the Bronze line in 124gr. And I believe the Bronze is in smaller packaging as well.