There are two well known styles of ferrules, one being a "Super Swiss" style and the other known as a "Step Down" style. Many people feel that the Super Swiss is a stronger system as less cane is removed and while this may be true, Payne and Leonard used step down style ferrules and did not have rods breaking so the truth is that both systems work well.
Each style offers a totally different visual aesthetic so study rods you like and see what ferrule was used if you are looking to replicate a rod. To me a Payne 98 taper made with Super Swiss ferrules looks like a man with a bad toupee, not good. The Super Swiss ferrules do come in a truncated (shorter) configuration and they look very nice and a good option for small rods or three piece rods.
Whichever style you choose don't take these small manufacturers for granted, nothing is forever.