The useful choice in this pack is size. The XS506 BN Jig runs from #06 up through #4/0, so it can cover anything from smaller jig-style flies to larger patterns meant for heavier fish.
Umpqua pairs a 60-degree jig design with a micro-barb and a strong wire, aimed at larger freshwater and saltwater fishing. That jig bend is there for an up-and-down “jigging” motion rather than a straight swim. If you’re tying with jig beads or want a fly that rides on that angle, this is the shape to start with.