With the Spoon there are benefits like improved pad wear with the force being more evenly distributed using the 4 smaller pistons, lighter weight as mentioned and I guess alloy will dissipate heat more effectively as well. But in reality you'd do well to notice these things unless you were a serious track user.
On my Racecar I use a fully reconditioned set of EK9 calipers, PBS pads and Pagid blanks and have never had an issue with braking during a race, some of the EP3's I've raced with have 6 or 8 pot calipers and c.325mm discs and I've never felt 'out braked' in the EG.
I think it's important that you have a braking system in good condition, a BMC stopper and some decent pads and tyres and I'd be surprised if you needed more, although Spoon calipers are lovely things!