You’d pay less Avios, of course, but you also wouldn’t get the CCR with this service.

Personally, I think the main advantage of the BA1/BA2 flights is during the daytime when you can really enjoy the more personalised service. If you’re asleep on the return you don’t know much about it! Nonetheless, if you’ve never been on a CWLCY service it’s certainly an eye opener to walk into a plane which is purely Business Class, so you might value that in itself - and the slightly earlier departure time means you would probably still get some of the service aspect.