ThinkPad

Intel is supposed to release their new gen of low power (U series) chips in the next month or two, if you can wait a bit, id suggest you do so because the current gen will certainly be on sale for the occasion. But I think the AMD chip will use less power under real life scenarios, while the Intel chip will likely be a little bit faster. Since the AMD is basically 70% of the price of the intel model, I would say save your money and go for AMD.