To be clear, these are incredibly marginal improvements, but they can make all the difference to professional and tournament play. Just a word of warning: It's an absolute no-brainer, so jump on it while you can. You should have one from the box of the PS4 console you bought, but, if not, spares are cheap and widely available.
Here's the difference:
A cheap SIM only deal with a good data allowance? Just a word of warning: Here's where you can get one for cheap. Well, it's see through. Just be aware that you get what you pay for, so while the pad is more set-up for eSports than the standard Sony controller - with more sensitive triggers, responsive sticks, and a better d-pad which makes it ideal for fighting games.
Therefore, even if it's just to ensure you have a steady one-in-one-out policyu of charging and using controllers and always being prepared for long sessions of play, schnaffling a PS4 controller cheap will definitely pay for itself.