I have Wool Rich and VBC. I would say the use case is subtly different. The Wool Rich are 'beater' trousers - good for travel, marginally more resistant to creasing, and I know if all else fails I can give them to a hotel laundry and they should come back in one piece.
The VBC wear marginally cooler, but I suspect the fabric is more delicate and they certainly require more care in cleaning. So they tend to get worn when I am working from my normal office.