The Goodyear hoses are normal rubber hoses with a blue outer silicon jacket. The heater core hoses on the GY kit are somewhat molded, but need to be trimmed to fit, and the kit DOES NOT come with hose clamps.
The FMS kit are pure silicon hoses, the heater hoses are molded for direct fit, and they come with special clamps that have a inner band that keeps the clamp from chewing up the hose.
The reason the FMS kit is more is because they are pure silicon hoses, are more direct fit, and they come with a full set of special clamps.
Hope this helps...