I don't know exactly, but I assume it's because of the colour, since the tablets in this colour are usually a bit cheaper than those in the other colours (at least that was the case with my S6 tablet last December). I can't find any other explanation. Sorry!

yes, have been using it for a year in this configuration

Interestingly, one finds more questions on the internet about whether an S7 pen runs on an S6 instead of the other way around. The reason for this is easily explained; the S7 pen is more like a biro, so it is round instead of angular and thicker. The problem will not be the functionality of the pen on the tablet, but the charging contacts. They are different on the S7 than on the S6. So technically using it would probably work, because the stylus will also work on a 1Samsung Note, but you won't be able to charge it on it. Greetings

Unfortunately not. This stylus is only compatible with the Galaxy tab S6.

The 2 spare tips (1 white & 1 light grey) can be found in the packaging with the pen (in a small plastic bag BEHIND the box where the pen is inside). Attention! Only later did I discover that 2 replacement tips were already included with the S3 as well as the S6 tablet(s) (check the original packaging!). They can be found in the small bag with the metal clip). There is a video on YouTube on how to replace the tips (it's very easy). I hope this information helps.

Basic answer: what Samsung has delivered with the new tablet is more than lousy. I have bought all Samsung tablets so far, the S6 is the worst I have ever experienced. SPen keeps losing connection, when charging it keeps showing on the screen how much % is charged. Had already sent it 2x to So. So said, as did Samsung, that it might be replaced the third time it's sent in. Keep your hands off this tablet, speed is not significantly better than the previous tablet. If Samsung doesn't get going here, I'll switch back to Apple or stick with my Surface, which I can really recommend. A bit heavier but always works.

No...they are two different pen systems. The pen on the S4 draws power directly from the display when writing.

No.