I have an offer to upgrade to a 4k streaming stick plus or an Express 4k+. The express says it has a "smooth" wireless connection, whatever that means, and the stick says it has 4x the range. Does one have a greater range than the other? One stick I have is 3600x and the other is 3800rw. Would the Express + or Streaming Stick+ have a greater range? Additionally, I do not have a 4k TV. Would the upgrade be worth it without a 4k TV?