The MIDI part may not be exactly the same, because I just tried to reproduce the original melody in Logic. There's just a touch of Valhalla Room, but not too much since the FAR mics can happily substitute the need of an external reverb.
To assess the timbre and sound qualities of my strings libraries, I've run them all through one musical phrase. First the violins 1 only, then the whole strings orchestra. With each library I 'performed' the phrase anew. So no copying midi tracks from one library to another. I corrected the most obvious mistakes and tweaked the passes for each library, but didn't spend too much time on the details.
I used panning and reverb where necessary, but no other external effects (except for some eq on Dimension Strings only, because they are Dimension Strings). Spitfire Chamber Strings 'stacked' means layered with the transposition trick.
Of course I don't know all the libraries equally well. Nor is there a musical phrase that suits all the libraries exactly the same. So this comparison tells absolutely nothing about the quality of each library. But maybe it is useful for some to compare the timbres, and hear how different these libraries all sound on the same musical material. So I thought I'd share. Here goes: