The distorto is hotter than the 59 for sure!
Check out the Duncan site for some sound samples.
The top end of the '59 is deceptive. It's not a high output unit at all, but it's still bright when pushed, mellow when played softly.
The distortion is much more high output and has a lot of high end too, but it's more...'grindy' if that makes sense. To my ears it has more mids.
Personally I wouldn't use the 59 in the bridge though, based on what style you say your going after. It's not going to have enough oomph. Lots of folks use it in the bridge, it just aint my thang. I have found it to be a great neck pickup though.
Check out the clips on the duncan site, they are short but well recorded and helpful.