Usually the boxes of screws come with the bottom, more silver bit. But today’s box had the duller grey, bit with a green lap band. No idea if one is better than the other or not.
Edit: Thanks to @0x0@infosec.pub for the wiki article!
Bits like that are used for impact drivers
that green band is a torsion zone. that bit is made to work with an impact driver. the shape spreads the increased torque over a larger area, making the bit last longer.
the plain bit is made for a regular drill, you can not use it in an impact driver unless you want to risk breaking it.
To the top you go because this has that ring of truthiness that’s enough to a layman.