(07 Jun 2021, 8:02 pm)L469 YVK wrote Why would GNE want binge drinking B7TL's on a route like the X66?

If the 6 went standalone, the PVR of the 6 would be 4x vehicles. The 6 would seem a more sensible choice.

What is the capacity difference between an Eclipse 2 & StreetLite?

Not sure on the specifics, but I know First here use B7RLEs on all day boards on services which are generally Streetlite/E200MMC operated very frequently. I'd suggest that points to the fuel economy not being significantly worse, as there's not a chance in hell First (of all companies) are throwing away that much money if they can help it. 

Capacity wise I'm not sure on the exact numbers of the X66 Streetlites, but the B7s would be a small increase regardless - especially in terms of forward facing seating. 

All that said, it would be a strange one to go from branded Streetlites to older, second hand B7RLEs (unless it's part of a bigger plan). Personally any move which sees B7s replace Streetlites would be a smart one, they're absolutely fantastic.