Comparing Named and "Generic" Internal Fellowships?

[AM61]

I know that internal fellowships tend not to matter much beyond the period of time in which you have them. I've been offered two rather different fellowships, however, and I'm trying to determine if the difference between them is substantive or not.

The first is UNC's Royster Fellowship, which comes with about a $6,000 stipend increase. It seems rather prestigious and selective, with the fancy name, university-wide competition, and inclusion into the "Royster Society of Fellows," with lots of different networking and professional development opportunities. My guess is that all of this apparent prestige will only matter while I'm at that particular university, if at all. So, Question 1: Do people outside of UNC (in academia or industry) know about (or be impressed by) this so-called "Society of Fellows," or is it just fancy window dressing on a (more competitive) funding award?

The above fellowship also includes two years without duties--one during my first year of intense coursework and the other in my fifth year during my dissertation work. (So from years 2-4 I would work as a TA/RA, but with a guarantee of the same level of funding as in years 1 and 5.) Question 2: As someone going into a STEM field, how much help is a fifth year fellowship? Everyone else in the program is already guaranteed TA/RA funding for 5 years. Would not having work duties be instrumental to finishing up my research in my fifth year, or just a convenience? (I'm sure that this will depend on the progress of my research and how early I start, but any input would still be appreciated.)

Finally, my other big offer is a rather bland-sounding college-level "Dean's Fellowship" which comes with a larger funding increase--around $13,000 more than my initial offer from that department. Only the first year has no teaching duties, however--for years 2-5 I'll have to work as a TA/RA but for the same increased stipend level guaranteed. While both departments are undoubtedly trying to recruit me, my gut feeling based on the fellowships is that I would be more valued at UNC. It seems as though their STOR department has had only one other Royster fellow in the past five years, whereas I get the sense that the other department's fellowship is much more common and less of a "big deal". Question 3: Is this thinking completely illogical? Does the difference between the level of fellowships each department nominated me for give any signal as to how valued I would be by the faculty and department? Does getting a more competitive fellowship inherently mean I would be a "bigger fish" in that program, or should I just take things at face value?

(Admittedly, trying to gauge how desirable I am as a candidate after I've been accepted might be a bit of a waste of time, but I'm self-aware enough to know that feeling valued by a given department is important for my productivity, self-esteem, and long-term academic success.)

I would greatly appreciate anyone's thoughts on any of these questions. (Or people to tell me to quit being silly and obsessing over trivial differences, if it turns out that the answers don't really matter.)