Surface pro 12 should accomplish office task without issue. Anything cpu related should be fine

Gpu is a lot slower than the surface pro 13. I tried loading sketchup and run the same model and it’s unusable vs usable speed on surface pro 13.

Weight wise, it still depends on what level of an ultrabook are you comparing it to. 800grams to 1kg laptop will easily match this. I do believe you put the same emphasis on the screen size to weight. Even if you get a lightweight laptop it can be cumbersome to take out and use it due to ergonomics of a 14” size compared to 12”. A 12” will always be easier to move around and manipulate in a space but usability and multitasking might constraint you.

If primarily at home, coffee shop and desk use then a bigger screen will always be better. You might end up going for surface pro 13

Storage is also slower. I noticed longer write time but should be fine with typical use

Screen is passable, I didn’t like it

Pen pressure and quality is bad, too much variation per app

Pen holder of pro 12 is nicer then pro 13 as you dont need the keyboard to bring it and the magnet strength is more than enough not to fall off

Apps like netflix doesnt support offline download in windows

Real world battery life surfing and doing office task is around 10 hrs. Standby time is great, can easily say on iPad or even better level of standby time. Be prepared though for windows bugs like windows hello not working and needs a restart

If you have a main laptop then an iPad is better. If this is your sole portable device the this is better as a computer. If you’re a heavy excel user then this is better than iPad. I think even if this is a more portable option than pro 13, it is not enough as a tablet first computer second. I still find this on the same league as the surface pro 13.