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!

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

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.