It certainly makes difference.
i am going to purchase a new gaming rig.....but not sure whether to buy an ordinary keyboard and mouse or an 1000 above keyboard mouse and major difference in quality...
But this is the issue with fifa only. If you are not a hardcore fifa fan, go for ergonomic keyboards, like it may have a palm rest, soft keys. These are very helpfull for long time gamings.
And for mouse G400 is good in this range.
1. It adds another layer of comfort while working or gaming. I mean seriously, if you are uncomfortable with the components you interact most then you can't use the computer for long hours.
2. Features, like extra buttons and macros come in handy every now and then, my mouse has both horizontal and vertical scrolling so I don't have to look to scroll bar, like EVER.
And again comfort, but trust me on this that comfort plays a vital role in the way you use the computer. Once you have used high end products which suits your needs then there is no going back at all. If you can invest then invest on it, its totally worth it.