I have the everlast traditional double end bag and it works fine for me. I got the smallest possible one they had and it really helps me with my accuracy and timing.

I guess it could be convenient to have the head and body combo.

 

any more input?

 

Mexican double end bag works great for me and i suggest it better than the traditional one cause the traditional one looks like a hassle.

 

I like the mexican one; mostly because every traditional one i've seen hung has been waaaaay too tight - hard to get the ball off of your gloves even with snap.
I like hanging double end balls loose because i think tracking the moving target helps.
If i had to guess, i would say that you can probably sit on your punches a little more with the mexican style one.
I really miss having one, it really helped me in sparring...

 

id go traditional because theres the wiring in between the bags, since u really wont want to hit the wiring ull have to consentrate harder which i rekon will help ur accuracy in the long run. Where as the mexican has the padding in between so it wont matter if u hit it thus u wont worry about it, and overall this lack of 'worry' will mean u hit the area between the bags more often and thus wont develop ur accuracy as much. however ive never tested this, its just what i thought when i picked between the 2, theres a good chane u wont care if u hit the wiring, i just found it off-putting.