Planet X or Giant TCR

I'll probably go for a new bike soon. To be used for comuitng to work (which will be part train ride) and then cycle.
I'm thinking of either a

http://www.planetx.co.uk/c/q/bikes/road-bikes/ec-130e-aero-road
Or a Giant TCR Advanced 2 disc

https://www.giant-bicycles.com/gb/tcr-advanced-2-disc
Planet X has the better spec I think and lighter, but the TCR as disc brakes which are more confidence inspiring in damp conditions.
Thoughts?
I'm thinking of either a

http://www.planetx.co.uk/c/q/bikes/road-bikes/ec-130e-aero-road
Or a Giant TCR Advanced 2 disc

https://www.giant-bicycles.com/gb/tcr-advanced-2-disc
Planet X has the better spec I think and lighter, but the TCR as disc brakes which are more confidence inspiring in damp conditions.
Thoughts?
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Also, you could argue that the slightly lesser spec is a good thing for a commuter, as it's cheaper to replace cassettes and chainrings while maintaining the same spec.
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Giant TCR is one of the best handling frames on the market.