I have not heard the metaphor "dolphin skin BBS" but I like it! I say "it feels like fine Italian leather" LOLI can see how the Leaf might not be for everyone, especially as it requires a bit of pressure to engage the head to the skin. The end result for me is good, but not as efficient as a Schick injector shave. Schick injectors are relatively inexpensive and the thicker blades are good for at least 10 shaves or more each.
If you want to maximize your double edge blade investment and not have to purchase a different blade style, the Leaf Thorn to me gives a result on par with the injector. Twig is nice too, but my preference is the Thorn.
I also personally prefer milder razor on the face, more aggressive on the dome.
After years of head shaving with cartridges, when I tried the Henson, it was the first dolphin skin BBS I had ever encountered. I also really like the light weight of the aluminum for head shaving.