Safariland is the only name in Duty Holsters. The Bianchi uses nylon for the body, while Safariland uses a Kydex-like material that is much sturdier. The Bianchi uses a poor belt mounting system that fails easily to gun grabs. The Safariland, especially when using the older style belt mount as opposed to the UBL, uses a much better mounting system which is very resistant to breaking. Bianchi uses a thumb break only, while Safariland offers a thumb break, the SLS Hood, or the ejection port lock, along with other systems, like the Raptor finger break, or the ALS break.
In the end, Bianchi makes good accessories, but when buying a Holster, Safariland is where its at.