X60s version difference?

[NielsHansen]

Hi!

I'm thinking of buying a X60s notebook in a couple of weeks. But I'm not quite sure which version to get. I'm going for the 'cheapest' availble in Denmark, this gives me 2 choises:

Lenovo ThinkPad X60s 1702: UK055DK (Same as UK055UK)
Lenovo ThinkPad X60s 1704: UK156DK (Same as UK156UK)

I can't figure out what the difference is. The price is almost the same but the 1702 weighs 1.3 kg and 1704 1.32.

There might be a different battery or something. Hope you can help me