CB sells the comfort and you can get the standard ones from Ventisit.
I had both (Standard on silvio, and comfort on Vendetta) last season.
On the new Vendetta carbon seat; the standard is comfortable I road on it last night.
On the old seat the comfort was a must for the vendetta.
If racing get the standard; if doing bulk mileage get you what you like; but that said; it's cheaper to get them from CB than it is to order one offs from Ventisit. Wish I'd have had that option when we got all of ours.
If I could have only 1 I would have the comfort. But I do plan to put some mileage on the standard one on the Vendetta this year as a test.
The CB site is out of stock so you could have Robert order a thin one if he can sneak them into his order.
http://www.ventisit.com/en/recumbent-bicycles#!/76x26-18-22-cm-Cruzbike/p/28856169
http://cruzbike.com/cruzbike-ventisit
This is one of the only must upgrades on my list; we have ventisit on every CB in our garage (V, S's, Quests) and extended family. That's a total of 9. You have to currently get the Quest ones from Ventisit.