Missed this.

The 2XU material seems thicker and 'seems' like it might last longer, but the main thing is that the Skins sleeves are way too long and come out far below my jersey sleeves. They work great when I wear arm warmers though, as they hold the upper end of the arm warmers very well.

Saw the Nikes at a local store, and they are not like real compression stuff, so ordered the 2XU. Will use the Skins in winter with arm warmers and 2XU the rest of the time.