Chandu
I Waxed The Badger.
I would take the One Blade Reason is with an adjustable, usually becomes one setting that you use and little to no actual adjusting. The Rexx is just another DE adjustable, I don't mean to detract, I'm sure it's a great razor. I have the Envoy and find it well built.My kid gifted me a Genesis for Father's Day and I look forward to trying it. In a serious groove right now with my Rockwell 6S though and don't want to break the winning streak. FWIW-I was given the choice of a Rex Ambassador or the OneBlade Genesis. Did I make the right choice? My logic was that I've already got a couple of solid adjustable in the Mergress and 6S, but my only SE remains a Rocnel SE-G, which I've never quite figured out.
The OneBlade is a different animal. SE razors are in general compared to DE. I have not shaved with the Ambassador but comparing the Envoy and Genesis. The Envoy shaves more smoothly, barely any blade feel. The Genesis is a bit tuggier. So the feel DURING the shave goes tot he Envoy. However, I have learned that the feel DURING the shave is of lesser importance than the feel AFTER the shave. The Genesis wins there as the Envoy always leaves me with some slight irritation. Almost unnociable with A/S or balm. In the summer I prefer to come right off the soap with a water rinse and be done as I have oily skin and additional A/S or balm will usually have me greasy.
The other razor I own that is not super comfortable during the shave but leaves my skin feeling just about untouched is the Muhle R41.
A/S wise, when I do need something I used to just use witch hazel but but have found the Imperial Bergamot A/S to be the deal. Their soap is great too, though unscented and a melt and pour type soap which puts some off, but I have found it far superior to any other melt and pour (Mama Bear, VdH, Ogalalla)
TMI, but sorry, I let my fingers do the walking (who remembers that phrase?). If you do, you're old like me. LOL