After trying WW chocolate cakes, I picked up Hostess’s Chocolate Zingers. They seem to be the closest.
Unlike WW which comes 6 individually wrapped cakes per box, the Hostess cakes come 3 to a packet. It’s very hard not to eat 3 at once which I suppose is in favor of WW if you are watching calories.
The Zinger was good. It seemed moister but not anymore chocolatey than the WW. It did have cream filling which was great.

Hostess Chocolate Zinger
Calories-150 (440 per package)
Appearance-7/10
Taste-7/10
Satisfaction-6.5/10
Overall-6.8/10