You lot need to get yourselves over to airliners.net for a refresher on Virgin's various straplines!
All the A340s carry '4 engines 4 longhaul' on the outboard engine cowlings (except for the odd one after an engine change). Some carry it on the upper rear fuselage, some have other slogans. The one that has largely been removed recently is the 'Backing the Bid - London 2012' slogan which is no longer appropriate, and explains those aircraft flying with a naked back end! Other slogans you may or may not see are 'Mine's longer than yours' (A346 only), and 'You never forget your first time'. There are others.
The B744 does not carry, and never has carried, the '4 engines 4 longhaul' slogan. There are no cowling slogans either. The rear fuselage slogans include 'The Power of 4', 'Better by 4', You never forget your first time', 'Fly a Younger Fleet', and there are still one or two carrying 'Backing the Bid'. There are a few that have lost that one and are currently slogan-less, but Virgin rarely goes for long without some new pithy one-liner appearing.
If you're all basing your speculation on such flimsy evidence as the aircraft slogans, at least make an effort to do some research before you make your opinion public!