With
anything involving a straight razor, there is no such thing as "too light amount of pressure". I suppose if you only take the whipped peaks off of the shaving cream that is on your face, ya might be holding back a bit too much... lol.
Though I am personally uninitiated in the use of DE's & shavettes, from what I've read, the Feather blades tend to "feel" and "be" extremely sharp. Also, modern disposable blades are coated with non-stick stuff. So that would be another reason why a SR will feel different.
On a final note, I'd like to leave you with a perfect visualization/reminder of
"no pressure":
https://youtu.be/qotCfV7Vgtg?t=562
:tu