Hey, I recently did just what you're asking about so I hope my results can help
I took these clones at the same time. Some I took from higher up, some lower down. I rooted them with Growth Technology CloneX and CCS, I put them in Rootit plugs and once rooted I put in a whatever 'premium' organic potting mix I could find from my local hardware.
The difference so far: The ones taken from higher up are a little shorter and bushier but that seems to be because the 'tip' like nature of the cutting, they were also slower to get started. The ones taken from lower down were cut a little taller, had less growth to start with but they blew the other cuttings away with regards to root development. I mean by a long shot, theses things are coming out the bottom of the potting mix pots in a couple of days. Subsequently it looks like, because of the strong roots, the ones taken down low have just exploded themselves above ground and catching up. The stronger root system and vitality in the clones taken from lower down appears of greater importance than the above ground growth of the cutting at the time [assuming you're taking from the right amount of inter-nodes, etc, and all things being equal, hence the lower down ones being taller...]
I'll take my next lot of clones from lower down, maybe one or two from up high as a control measure, but as this was my first time taking clones it was an experiment and the result, for me, spoke for itself.
All the elements have been as equal as possible to give as best and fair a result as I can but as I said this is my first time, bros, so take it for what it is