Onshape hands down. Browser based so there's no compatibility issues. It's super easy to use and pretty powerful. Its free for hobbiests (the caveat being your models will be publically accessible). We use it exclusively at work and it's been awesome.
Onshape.com
I'd love a good Foss CAD package but there are too many issues with the current ones for me to make the jump.
I'll start this by saying I'm not familiar with either model, but as a general rule, always go x86 when you can. The Intel processor is going to be much better supported. You might get the snapdragon version to run, but it likely isn't supported by mainline Linux.
That being said, touch screen support on Linux is improving rapidly, but still isn't quite there. Make sure you're aware of the user experience before buying so you won't be disappointed.
Also, my unsolicited 2 cents, I would try to avoid buying lenovo. I've had the unfortunate responsibility of fixing a few of their products (an all-in-one and a few laptops, including a new thinkpad) and can confidently say their reliability, and repairability have greatly diminished. They use cheap parts and are in general, poorly designed.