The open comb WR3 is surprisingly efficient in the mild gaps. I went down from a .35 to the .25 and honestly it's really hard to tell the difference in efficiency. Both are plenty efficient for me and work fine on multiple days of growth. It's much more comfortable than a Micromatic especially ATG.
There's truth here. I'm a Gem-format fan but always struggled with some irritation from a close Gem shave. I've had a broad selection of vintage and a couple of moderns from several makers. All of them but one displeased me to some extent, such as trying to get a good ATG pass out of my MMOC, or accommodating the lightness of the aluminum Starling V2. Finally I got to "somethin' ain't right here" and stopped using the format except for a yearly durance vile for SEptember. Then the Universe handed me the WR3 0.35 OC. The shaving gods smiled on me! It's a great razor.
O.H.