Have done a number of the pre-season friendlies over the years (the Dripping Pan at Lewes seems to have become a regular fixture now!) and the new kit is always in use during those games. Normally the home kit is available to buy to coincide with early pre-season friendlies, with away kit...
I did find that the Nike kit material was a lot nicer (in my view) than the Errea one. More breathable when warm, etc.. As you say though, decent collar!