The name represents the style of the bird. Sweaters are generally much different than say a "ruble" hatch. Even now though most would say the rubles aren't the same as they used to be. Probably true with every single bird out there. The idea is you wouldn't expect to see a ruble hatch that's extremely high station that has more of an in air style. Just the opposite.
Besides just crossing two lines and calling it your own is fine and dandy but that's generally not how it was done. It would take years to get the cross as good consistently as the original two lines, it's assumed they were good to start with. From everything I've heard and read it usually takes multiple infusions of one line or another year after year with strict culling all but the best. Easier said than done. D*mn near impossible for the average backyard breeder with only a handful of birds. Could probably get there quicker the more you hatch, but obviously you'd be culling a whole lot more too.