The only way anyone is going to see which muscle group the reverse/curl grip is going to hit, for you only, is by doing the exercise for awhile. Generally speaking, it will hit the triceps , front delts and to a minor degree the pecs. Military presses can also hit the upper pecs also.
If finding that the upper pecs are engaged strongly from close grip reverses, than you are a rare and lucky individual. Which you can thank your parents for.
The football bar is an extended version of the tricep bar, but with more grip/spacing available. Can take a little getting use to at first. Some like it for front squats , jerks, push press, triceps, cheat curls, etc. Don't remember what the basic weight of that type bar is, but probably more than the 45 of a stripped Olympic bar. Most guy's don't count the bar in the overall weight, just the plates on the bar. These special designed bars are more money, so maybe that's the reason that most everyday gym's don't have them. And I doubt the average BB'er would ever use one.
Football trainers also like the trap/shrug bar for serious workouts. That also has the thumbs in the more natural position of thumbs forwards. Some of these bars have handles raised higher so your doing more of a 3/4 DL . We have a couple of arc/MIG welders who can make all sorts of weird looking workout equipment . Good Luck.
