the key issue here is that the wider the tire, the lower the pressures can be--which can be a major factor in comfort for the rider. Tire construction can be a factor too--two tires the same size can feel very diff, if one is super stiff, stiff thick sidewalls of the tire etc it will have a stiffer ride at the same pressure as another tire that is more supple (on that note, the Schwalbe supremes are a more supple tire)

but back to pressures, because I commute a lot and do the same route over and over, and because Im a bike nerd and find things to amuse myself, I will try diff pressures to see how the bike feels. Going over the same route that is 11-13km long means I have time to feel the diff. You'd be surprised how a tire you put at lets say 110psi will feel quite a bit more comfortable at 100, or 100vs90 or whatever (this example is my 28 slicks)
Same with my 1.5 inch tires, go from 65 to 55, or 60 to 50 (or whatever pressure) and you really feel an improvement in comfort.

so basically, a wider tire allows you to run lower pressures than thinner tires, and so the diff between a 32mm and 35mm may be slight, but it will be there.

*also, wider tires at lower pressures than narrower tires will be a bit easier on your spokes/wheels.