I've listened six times - and (to me) it is very subjective.  I "get the impression" that the first bow *seems* to have a greater "attack" on a note change (in the sense of "attack and decay" ( I hate the usage of attack, it means so many different things ).  My better-half here thought the second was "not as mellow" as the first - but - she only listened once through.   I have no particular preference, but, I'm going to listen again through decent speakers, and, (because there is no hope for me at all) I'll capture it in Audacity and look at the wave form spectra....   (which will be JUST as subjective as listening, but I'm just curious).  I'll post the results of the investigation later !