Tough choice! I think both are pretty comparable, so you just need to go with the feel of them I think.
I like the first one's proximity to station and shops (good for late night returns) and the separate kitchen is also a real plus. What is the outside situation like? Does downstairs have a garden for their use only? Might be frustrating watching summer parties when you are upstairs!
I like the second one for being higher up so there is a feeling of space - you can see the outside from more windows and the hallway looks like a nice size also. I don't like the kitchen being in the living room (maybe you could turn a bedroom into a snug and have the kitchen as more of a kitchen?) Also, if you are directly under the flat roof I would just be cautious about the lifespan of that.