Him say what me say but gooder.Steel for razors only has a couple of requirements:
1: It needs to be fine enough in grain structure to take a proper shaving edge. This is really not complicated, and even a dirty, simple, mid carbon steel can achieve this. This factor is more about how it is heat treated than which steel alloy is chosen. Any competent razor maker would have done a more than adequate job.
2: It needs to be strong enough to maintain that fine edge through shaving. Again, not particularly difficult. The only real requirements for the steel alloy in this regard are that it have sufficient carbon, and be clean enough from detrimental inclusions. After those two incredibly basic requirements are met, the heat treat is the next super critical factor, and again, any competent manufacturer would have done more than adequately.
The differences people express in "English Steel" vs. "German Steel" are more to do with honing and geometry than they are with the shave. Different steels will have different characteristics in how hard or easy the razor is to hone, and how well it maintains its edge to last a long time between honings. Often, these two traits are traded off, one for the other. Meaning easy honing razors tend to need honing more often, and visa versa. A truly great razor would take its edge very readily, but stubbornly hold it through a lot of use. Such a unicorn is rare, but they can exist.
Most of the differences people experience are in geometry. Due to the way local craftsmen compete with and collaborate with one another simultaneously, you will find a lot of similarity in both the tooling and how it is employed among razors ground in Sheffield during one time period, but there will be some differences when those razors are compared to razors ground in Solingen a generation before or after.
Those differences lead to geometry differences in the razor - slight variations in thickness, degree of hollow, thickness of spine, exact width of blade, and the relationship of each of these geometries to one another, all of which can have subtle impacts on how the razor shaves.