I think the tinybox is an obvious winner. Both will do the job, but the tinybox will function as a pream as well, which is a big bonus. I run all naiant pres and love them all. Jon's stuff is a great build every time, and if ever you have an issue be stands by his product no matter what, being fixing any issue. The customer service alone would do it for me, that and keeping the money in the community. Which then he can use to make even better products, which he does! I'd go naiant all the way.
Also reliability the art is more likely to have problems, the naiant products are tanks.