I figured that much on the perf plate, as I've seen some helmets sold with it as an option.
I don't think there is such thing as a universal "better" on wooden waster vs steel trainers. To me, what is better depends on the intent of the group or demonstrations.
Is steel better for historical appearance? Yes (Pro)
Is steel considerably harder on equipment, increasing time and cost of maintenance? Yes (Con)
Are wasters a "sword" to the common folk? Not so much (Con)
Are they considerably easier and cheaper to maintain and less destructive to equipment? Yes (Pro)
As Sir Edward said, the trade-off in safety is all about the head/face. For me, if something goes wrong, I would rather break my arm from a wooden waster than be stabbed in the eye from a steel trainer. I also don't want to be putting out as much money in maintenance and gear replacement (from using steel) as we raise in an entire season if there is another suitable option (wooden wasters).