Bruce,i have never lost a coyote,fox,or a bobcat that was caught across the pad or knuckles with an offset trap,that i know of.I have held 'big' coyotes,caught by a couple of toes.I pretty much thought the same as you,untill a friend "a former pennsylvanian" moved to Montana and went into some serious trapping.He averages anywhere from 80 to a 150 coyotes a year,and uses 'all' offset traps.The last i heard,he caught 100 this past season.
VarminterSpecial,a good 1-3/4 trap will hold just as good as a #2 trap.The advantage of the #2 trap is jaw spread.The larger the jaw spread,the better the chances the animal will put his foot 'inside of the trap'.I think knowing how an animal is going to approach a trap,and,forcing him to put his foot where you want it,is very important.There are many places where 'i know' i can get away with using a 1-3/4 trap,and thats for coyotes.Getting the animal to put his foot where you want it is the name of the game.I use mostly #3 traps,but many times,i use the 1-3/4.
I actually think the offset is better...Less broken skin and legs,and if they are laminated,you will hold more of the animals that chew there foot...Good luck on whatever you choose,or chose.