There is no sub for the S&H series. The others do not come close because they all have some degree of endurance work and S&H has none at all.
It is the most refreshing series and yes, you can do it, just like I can.
You want to build serious strength? You want some increased muscle mass and superior definition? You want to really increase the amount you can lift and break through some strength training plateaus? You want to balance out the top and lower halves of your body? Then you have to get and use the S&H series.
I don't think there's a Cathe series I have not been afraid of at some point in time. I used to think this series was for the "really serious weight lifters". Well, guess what? That's become me!! When I began to swap from S&H to GS recently, I have up and went back to the S&H because the GS was going too fast, I missed my heavier weights and I didn't want to do three million push ups!
Never be afraid of a Cathe workout. Everything is doable. Welcome the challenge and conquer it as others are doing and have done before you.
Clare