Jacob
What goes around comes around.
The use of the plane is in the name "scrub" i.e. to clean up rough stuff. More refined than axe or adze. Has to be a narrow blade with a tight camber so that it's cutting into the clean wood below. Hence a 2" blade is on the wide side as most of the blade would be unused and wasted, or not enough camber; not a deep enough cut and hard work.Really? I thought a lot of Scrubs were just converted No4s.
What is a 78? Sorry, I don't know that term
Stanley 78 designed as a rebate plane has a nice narrow blade and you could put a tight radius on it. In fact they are very handy and get used/misused for all sorts of jobs and often turn up nackered with parts missing. Should be good as a scrubber but I've not tried it myself.
But the woodies are best - small, light-weight, deep cutting. Also known as the "Bismark" design much like the ECE modern version.