Since the OP is looking at the base model for the 2012, I have to assume he is also looking at the base model for the October 2013s. As such, this list is incorrect, partially misleading, and incomplete.
The CPU speeds for the two are going to be roughly equivalent, with the current model (2.0Ghz) being a couple precent faster.
The new GPU is a downgrade and is definitely not faster. The 650M from the previous generation offers superior performance to the Iris Pro 5200 in the current generation.
You left off the faster Wifi 802.11ac in the new models, although that only matters if the OP will be using an 802.11ac router.
The screens are always a crapshoot, but sometimes the luck will actually be better with the refurbished models. I would not give the edge to one generation versus the other.
----------
If that's the price difference in the UK, I'd say certainly not, unless TB2 or 802.11ac are big deals to you.