Unlikely, but if the ISP gets to terminate the fiber at the head end --- one ISP may be willing to run 10G and others only 1G.
More likely, the last mile provider does termination, so line speed isn't negotiable by provider. Instead you're competing based on peering and transit connections, oversubscription ratios, availability of static ips, other policies, customer service, etc.
More likely, the last mile provider does termination, so line speed isn't negotiable by provider. Instead you're competing based on peering and transit connections, oversubscription ratios, availability of static ips, other policies, customer service, etc.