Personally prefer grooved head designs first then matt and polished last.
The Double open design from PAA left lather lines behind on my face which allowed buffing or further strokes like it was the first past.
PAA Prismatic (scalloped) left a lather film behind that allowed more passes and kept the skin from drying out before the end of the shave.
Find smooth caps don't glide as easily and if also doing a second stroke on the same pass feel resistance, more noticeable on my standard Merkur head. And as you know are mirror finished in chrome and feel like a suction cap in comparison.
But again IMHO.
So.. for this I'm hunting a charcoal goods head one day soon. As most reviews have mentioned that the grooved surface leaves a lather film behind.
For the Guerrilla, matt finished but as with Wolfman pedigree he has finished it smooth as so again second stroke I get alittle resistance. And no I'm not riding the top cap as a get BBS with that piece of art in two passes with some chin buffing.
Strongly believe every SE & DE should have a grooved cap. Less relathering, buffing allowed, keeps the face from drying out in winter and reduces time.
Imagine if Wolfman grooved the cap. Less polish time would be required.
Another thing against polished heads is once the cap is marked it is more noticeable.
YMMV