Also FS- stock WRX midpipe (the piece between the axleback and the 3rd cat). $5, a beer, OBO. Other items have been sold.
Different mfr. Probably very comparable. On Maddad's site the Stromung is $30 more than the Maddad. Sounded wonderful on my catless '02 WRX engine.
I ask because Stromung private label mfrs the Maddad parts. In fact when you order Maddad exhaust components they come shipped from Stromung, not Maddad. I suspect subtle differences but likely pretty comparable to your point. Good gear - GL with sale.