First, it's "coaches" (plural form of "coach"
, not "coach's" (possessive form of "coach"
...not to mention "there" should be "their".
Second, you are indeed "comparing" them when you directly compare records of coaches during the same portion of their careers.
Third, Hayes, Paterno, and Bowden were relatively young coaches coming into big-name schools either from smaller programs with little experience (Hayes had only two years at Miami, Oh; Bowden only four at Samford, Al) or no experience at all (Paterno). Weis came in from a 3-time Super Bowl champion team (albeit he was an offensive coordinator there and not a head coach) and had been a coach at the pro level for 14 years.
Fourth, look at the second years of all four coaches. Hayes was 6-3, with the three losses coming by scores of 21-14, 8-0, and 21-14 (Ohio State also pounded Michigan 27-7 that year). Paterno was 8-2-1, with losses by scores of 23-22 and 17-15, with a 17-17 tie with Fla St in the Gator Bowl. Bowden went 10-2-1 with losses by scores of 23-17 and 41-16 (and won the Tangerine Bowl huge, 40-17). Conversely, while Weis did go 10-3, all three of his losses were total destructions: 47-21, 44-24, and 41-14. Weis has also lost both bowl games.
Probably not a smart comparison on your part...