With all the old franchises receiving reboots I'm somewhat surprised that it took so long for Thief to get the treatment. Because the Thief series has always held a bit of a niche appeal there's been a lot of speculation about the reboot and whether or not it would carry the spirit of the older games or fall into the trap of over-simplification for mass appeal.
I decided to do as fair a comparison as I could between old and new, so I replayed several hours of Thief II: The Metal Age before touching the new Thief. I examined both old and new with a critical eye, trying hard not to let my own nostalgia of the series cloud what it actually was in order to give the reboot a chance to stand on as even ground as possible.
Here are my thoughts and impressions after playing the first 5 hours of each game side by side.