I would describe 555 as slightly nutty myself. These flavors are so hard to describe. I do really like it, though. I don't consider Red to be sweet at all, especially not compared to the RY4.
Gardner, none of the pre-filled
tobacco flavors is exactly 'analog-like'. The Red is presumably supposed to be their 'Marlboro' flavor...but it's not much like an analog. It is the most similar to analog, I suppose, because Kamel, 555 and RY4 certainly aren't. I wish the sample packs were out so you could let them choose.
I'd say if you're looking for analog-like with the pre-filleds, get 555 and Red...just don't expect them to be 'nasty-analog' like something like VS Tampa.