  We investigate the relaxation of braided magnetic loops in order to find out
how the type of braiding via footpoint motions affects resultant heating of the
loop. Two magnetic loops, braided in different ways, are used as initial
conditions in resistive MHD simulations and their subsequent evolution is
studied. The fields both undergo a resistive relaxation in which current sheets
form and fragment and the system evolves towards a state of lower energy. In
one case this relaxation is very efficient with current sheets filling the
volume and homogeneous heating of the loop occurring. In the other case fewer
current sheets develop, less magnetic energy is released in the process and a
patchy heating of the loop results. The two cases, although very similar in
their setup, can be distinguished by the mixing properties of the photospheric
driver. The mixing can be measured by the topological entropy of the plasma
flow, an observable quantity.
