Hi Craig
we also looked at the 6-berth Bailey (and all the other vans with the same layout - spent months over it!!!), but have today taken delivery of our Sprite Major 6 which has the same layout. A couple of sales staff told us this is better built - eg the bed slats are better than in the Bailey. However, whether this is true I don't know, you know what sales staff can be like! The Sprite was a bit more expensive but we had a really good discount from Highbridge Caravans which helped with this. We were also able to take delivery within a month as Highbridge had a couple in stock.
Personal taste I know, but we find the interior a lot lighter and more modern than the Bailey.
Obviously, it's a heavier van which might be a deciding factor for you. The Baileys certainly seem to be popular.
The thing that helped us most was finding a dealer that sold both models so we could run back and forth between the two, pick the dealer's brains on which was better and decide which we liked the most. Don't know where you live, we went to Golden Castle Caravans in Gloucester to do this. Didn't end up buying from them, though!
Good luck with your decision, we do sympathise as it's our first brand new van and it's a lot of money to part with so take your time to get what's right for you.
Sorry - this has turned into a bit of an essay!!!