from comp to comp, consistency and trends over 5 or more contests. Especially in taste - does it look like people are swinging away from sweet or hot depending on how you cook. You really can't just compare one contest to the next as you could just get "bad" tables at one. Now "bad" doesn't mean bad judges it means that their taste is different from the norm of judges. Again that's assuming the there's a norm for judges.
Appearance - did you do something different and if so how was it received. Did you do exactly the same thing and the scores were significantly (2) higher or lower. That type of stuff.
It's hard to rend tenderness from scores. You already know if it was better/worse or the same so I just shrug off differences.