The Matias linear's actuation force is 35±5 gf = ~34.32±4.9cN where the Cherry MX reds are a 45cN actuation force, so the Matias linear's are lighter.
Although O-rings come in different sizes, a common size is ~1.5mm. Since the difference is by 0.5mm, then it is less of a travel distance so (correct me if I'm wrong) but you shouldn't notice a difference.