I would just like to mention soma saddles are cheaper copies of a name brand saddle. Not sure about quality differences between theirs and the original makers; always owned originals. The Kamisori seems to be based on the selle italia SLR saddle but with the relief perforation (or whatever its called)...
Anyway the SLR, what it seems to be based on is a great and popular saddle; I personally own have one on my orbea orca.
I cant' comment on the Kamisori, but I got the Soma Ensho to replace my stock Kilo saddle and I like it. I'm guessing it's a Velo--it's almost identical in shape and construction to the Charge Spoon (can anyone confirm that they are Velos?). I originally wanted the Spoon and ordered one from Wiggle, but it took over 3 mos for them to get them in stock. In the meantime I picked up the Ensho, which I expected to swap out when the Spoon arrived. It's been over a year, and I'm still on the Ensho, and the Spoon is sitting on the shelf waiting for the next project.
If I had it to do over, I'd get the Spoon: Just as comfortable, but 1/2 the price and better looking.
I have both the Soma Kamisori and the SLR Gel Flow saddles. As stated earlier, the Kamisori is pretty much a knockoff of the SLR. It is surprisingly light weight for a steel railed saddle, only a few grams more than the titanium railed SLR. The covering is synthetic and not leather, and my rear end slides around a bit on the saddle when riding. It felt strange at first but I have gotten used to the feeling and kinda like it. There is less padding than the SLR and the plastic shell underneath is thinner so it has a bit more flex which for me is more comfortable. Riding on it (and the Brooks Swallow) is sort of like being firmly suspended on a hammock. It is not as well made as the SLR and will probably have a shorter lifespan. I got it on sale for 40 bucks, no complaints here.
I am stating the obvious here but saddles are a highly personal choice and what feels good to me others might find unrideable. For reference, I am a skinny guy and my preference is for narrower saddles (Swallow over B17). Hope this helps.