[eds]

6-sided sockets are better fit and do less damage to the bolt & nut heads. Get those if available and within price range; as long as they are chrome vanadium. Should last a lifetime. Next set, long sockets.

 

[eds]

Sockets are (mostly) used with a Ratchet (i.e. the geared handle with forward/reverse); 6 sided is best; practically no cons or negative if used with a ratchet.

Wrench is fixed size; Ring or Open ended; also known as Spanner in UK, etc. A 12-sided Ring Wrench is the norm and most practical (easier fit angles); they are the most useful tool (more so than sockets & ratchet set) cheap too, buy a set.

There are also 6-sided Ring Wrench which is more "specialist"; avoid unless you have a need for it (unlikely).

Note: I have been "wrenching" for as long as I can remember, decades (shows my age). I know my tools. In those days, sockets were "specialist" and expensive.