As a WT+ veteran who finally made it up to CW, I can say the WT+ Cabin is a lot smaller and more intimate that CW. While you do have to share toilets with WT-that dreaded curtain is always shut by the CW loos, I like the fact it's a little more leg room and smaller cabin.
Is it worth it is something only you can decide. I found the FAs in WT+ oddly more friendly and less robotic than CW. But I love the flatbed and food in CW.