The difference between col-md-push-* and Col-md-offset

The difference of realization way: col-md-offset-*, is realized by using Margin-left, col-md-push-*/col-md-pull-* is realized by using relative position.

The difference between the effects, col-md-offset-* can only be cheaper to the right, because the implementation is margin-left, and push/pull because it is relative positioning, can either left offset or right offset

Also, if one line of offsets + the actual width of the composite exceeds 12,col-md-offset will be wrapped, also because of margin, and Push/pull will only be partially invisible (beyond the container), because it is relative to its own positioning.

From the functional point of view, push and pull can be used to change the position of elements, more flexible.