I am writing this comment on my Spectre X360 15 that I purchased earlier this year. It is a gorgeous machine, and the best laptop I have ever owned. I do love the 4K display, and I use the Pen input every single day for a variety of note taking, diagramming, and photo editing. The touch pad of the Spectre is Synaptics, and as such does not have the feel of the Precision touch pad on the SB (I tried installing the Lenovo Precision driver, and that does work after a fashion, but it was a complicated hack...) I am very attracted to the 3:2 aspect ratio and better color accuracy, as well as better brightness on the display of the SB. However, for the price difference, no one can fault the purchase of the Spectre. If I were a gamer or video editor, the decision would go to the SB again. It is wonderful to have so many options!