(01 Nov 2015, 9:53 pm)Dan wrote 30 seats on 637 - 639 opposed to the standard 27 on the other Nexus branded examples.
I think the number in the model name of Optare products represents the size of the vehicle? As such, the standard size is 8.9 metres and 637 - 639 are 9 metres?
I'd guess that too. Even with the Versa, V1170 is the model name for the 11.7m Versa. Can't be a coincidence surely.