Do HQ (+1, +2, +3..) items have any visual differences compared to their standard NQ versions? I've heard a while ago (the armored cavalry bow in particular) that they do, but have yet to see any side by side comparisons.
One of the "Making the Realm" videos on the official youtube channel mentioned this. They said there was supposed to be a difference. I've yet to notice anything but haven't done any sort of side-by-side comparison.
When I swapped between Sentinel's chainmail and Sentinel's chainmail +1 (to compare stats) my character did not blink, indicating no visual difference. Some HQ items may look different than their NQ counterparts, but Sentinel's chainmail does not.
Like Final Fantasy XI, the game specs will be extremely high for the time, but in about 5 years, an average machine can run it on max settings with little to no issues. Tanaka also expressed interest in making a benchmark program available.