Plants sold as 'Compacta' here don't fit the depiction in the 2002 edition of The Hillier Manual of Trees & Shrubs (Hillier Nurseries, David & Charles, Newton Abbot) of it being

A small, dense shrub, often shy-flowering and fruiting

and may instead be a seed strain as I have seen varying characteristics right in the same block. Large growth and abundant flowering and fruiting appear to be typical with these. With the other cultivar you are more likely to get a clone that performs as represented.

Otherwise, the best one is 'Rubra'. But it is not dwarf.

Today I saw Molbak's has one or two clones on offer as 'Compacta' that look dwarf. But the ones in the five gallon pots have flowerheads dispersed throughout.

(They also have a much better supply of one gallon camellias than Emery's, Sky, Swanson's or Wells-Medina. Wells-Medina has a huge block of camellias in bigger pots out behind the store, in front of the shade and flowering trees. I assume these are going to be moved into the bigger greenhouse soon.)

Here is a link that might be useful: Molbak's

I saw some A. unedo in planter boxes right on the Seattle waterfront, near Ivar's, some years ago. They were heavily fruited.

I haven't noticed shy flowering on 'Compacta' either, but I'd say to get 'Oktoberfest' just for the name.

Probably another instance where something was selected, named and put on the market a long time ago and has long since been replaced by seedlings or multiple clones that have little or nothing to do with the original introduction. When I see multiple assorted different flowers and leaves all together I'm inclined to think I'm looking at mixed seedlings rather than a vegetatively propagated clone.

Other familiar examples are what are clearly seedling populations being sold as 'Bloodgood' maple and named forms of flowering currant.