Steve76,
The planform seems identical!
The efficiency of the Carson blades (I think that is the name, I can't quite make it out from the photos......) is quite good, they are quite up to modern standards.
We use Figure of Merit to describe the amount of lift you get from the rotor as a percentage of the ideal lift from a perfect set of blades.
The best we have ever tested is about .80 (80% efficient) which is the standard for the next generation.
The Carson blades are about .78, as is the S-92.
The BERP blades on EH-101 are about .74 (not shabby for the early '80's when they were designed.) If the EH-101 had Carson/S-92 blades, it would lift almost 2,000 lbs more for the same power.