There is a really good comparison video here:
YouTube:
video
I personally ordered the Vaio Pro 13 (after returning a Haswell MBA 11 that I decided I didn't want). I'm looking forward to receiving it. The 1920x1080 IPS screen was the kicker for me.
I was in a similar boat with laptop shopping. I've never owned a Mac, and bought the 13" air. Even after seeing the Sony i have no regrets:
-I've never liked touchpads until owning a mac. Its the first laptop where I feel like a mouse is inferior. In this review, and others, theyre having to fight with the touchpad (like where shes just trying to hit play on a video and switches to the touchscreen)
-keyboard flex and overall build quality of apple devices trumps the cheap plastic elsewhere
-Battery life
-Windows 8 is just an OS i cant get used to. I've tried on my old laptop that ran it fast, but man...Metro is awful and I can only see metro apps being useful on a device like the Thinkpad Helix or Yoga where it can go into tablet mode(not just touch). Who wants to use their laptop then reach across the keyboard.
-OSX is quite a delight. Finder is the only thing i really hate about it.
-And the one thing that really annoys me...Every PC laptop has some sort of issue. Touchpad, flex, poor build quality, fan noise, overheat/throttling...you name it..Every one of them has some sort of issue, even going into the $2000 range i couldnt find a laptop that was compact and didnt have those issues.
I dont care if 1080p screens come around. The Air's screen is beautiful to me. Windows requires it for multitasking, but after using OSX ill never look back at windows for a laptop(desktop is another story as im a gamer). Multitasking on OSX with the workspace switcher/app full screening/gesture switching has just made me fall in love with the device.
Overall, im done with the maintenance/issues/Drawbacks of PC laptops.