As far as I know, Swisscom no longer differentiates between SMEs and enterprises, there are only RES and B2B customers. This means that every SME can order a 10 Gig GFA if it is available and the SME can and wants to afford it.
Ultimately, the question also arises as to whether an SME needs a 10 gig line. I know a lot of enterprise customers with a few thousand employees who “only” have 1 × 1 Gig or, for redundancy reasons, a maximum of 2 × 1 Gig. have.