Isn't performance the only thing that changes? I am pretty sure you can use creases without open-subdiv and support loops with it. Sometimes it's easier to crease than to add edgeloops. example
The example you provided is so incredibly simplistic is really doesn't matter what method you use. Your edge widths are also kinda bad. Anyone who has done any level of advance mechanical modelling will know that chamfering is not a replacement. It just doesn't work in places. Not only that, quad chamfer won't transfer…