I don't know because I haven't visited CWL for a few years, but I read recently, and Jerry seems to confirm it, that the CWL airbridges may not be suitable for a Qatar-type operation. The airport might well have to acquire one that is more suitable. As Qatar isn't beginning operations at CWL until next year there would have been plenty of time to have an airbridge installed at BRS had Qatar gone there.
BRS has planning consents for an airbridge, and has said it will acquire one when needed, which many took to mean when a wide-bodied aircraft began a regular scheduled long haul service.
As an airport BRS is well ahead of CWL in terms of terminal provision. Its terminal infrastructure is bigger and more modern. The Aspire-Plus lounge would be ideal for Qatar's business class passengers. I've read that CWL will have to upgrade its own lounge to bring it up to Qatar's standard for its premium passengers.
BRS owners have spent over £200 million on infrastructure in the past two decades and there is much more to come so I think that shows ambition.
BRS, like most of the smaller regional airports, does probably give off a perception of being mainly a 'bucket and spade' airport, but a look at the top 20 routes in 2016 in passenger number terms dispels this to a degree. The top 20 routes handled 4.582 million of BRS's 7.6 million passengers in 2016 and were in descending order Amsterdam, Dublin, Edinburgh, Palma, Malaga, Alicante, Glasgow, Faro, Belfast, Geneva, Tenerife, Newcastle, Lanzarote, Barcelona, Paris, Krakow, Rome, Toulouse, Madrid and Ibiza.
I would have thought that only seven of them are out and out bucket and spade routes.