I changed from 23mm to 25mm this year, er, last year. The difference was enormous! Nah, I'm kidding. It's only slightly noticeable because I run 10 psi lower with the larger tires. It's 1 freaking millimeter on both sides at the most, it's not magic.
I would stick with what you have, no need to waste money. Feel free to get 25mm when you need a new tire. Theoretically it should help with any potential pinch flats.