Brass makes very poor bushings. It extrudes too easily, and doesn't have the best anti-friction properties. Brass makes good fittings but poor bearings. Bronze is what you want, and for general-purpose bushings C93200 is the right stuff (what the oldtimers knew as 660). It is tougher than brass, but machines just as easily due to its lead content. Oilite is a brand name. Oilite makes a wide range of sintered bearings and bearing stock, and they have different applications. Some are designed for higher RPM lightly loaded shafts, others are intended for low-RPM heavily loaded stuff. Their chief advantage is their self-lubricating properties. And many of them have lots of iron in them; they're not just bronze.