SolidWorks 2014 uses "Segoe UI" font which should be installed on all Win7 and later machines. Can you show us a snapshot of your screen?
First, here's what SW13 looks like (which is fine):
Second, this is what SW14 looks like (which makes me want to gouge my eyes out):
It looks to me like some kind of random sub-pixel rendering has been turned on. [Sometimes apps that insist on calling cleartype in spite of the system settings get this look.]
Note also - the "summary" pix the forum software shows make it hard to see the difference, but at least on my machine if I click to get a bigger pic the diffs come through.
Also, I had never heard of cleartype, but out of curiosity I checked and I have it enabled on my machine. I tried turning it off and the text in my feature tree didn't change, but some other text got really ugly (like text in the toolbox browser area).
So, SW13 on a 30" dell connected to my laptop looks great.
SW14 on that machine looks much worse than any of your pictures - and yes, it looks like the anti-aliasing run amok.
SW13 on my desktop and SW14 on my desktop look pretty much like Anna Wood's picture (30" apple cinema display)
So it appears there's some issue with how SW14 interacts with the anti-aliasing font software (cleartype) on my laptop.
I will examine that configuration more closely.