Walker continental stove vs batchbox

So after finishing my first rmh last year I am now looking to my next project. I am renovating a property for friends to move into this summer and as there is only an old cast iron stove in there at present I am deciding on the best heating option for the space.
To offer a few details the house is quite small, no more than 40m2 floor space, with first floor and mezzanine. It will be well insulated but remaining quite open plan. It is an old house of stone construction.
Primarily the stove will be for space heating of course but the addition of being able to cook on it appeals too.
The questions I have are around  :

-ease of construction
-efficiency (are riserless cores as efficient as a classic batch box?)
-ease of use
-can oven features easily be incorporated into a batch box?
-heat output and retention

Thanks in advance I would appreciate any input!

Hi Mike;
Both styles are simple but also labor-intensive.
Both styles are tested to be super clean burning.
The Walker has a smaller firebox and requires feeding more often.
The problem with batchboxes and ovens is controlling the heat, they generally get pretty hot.

Both stoves hold heat well, but the batchbox with its much larger firebox and matching large stratification chamber, especially if constructed with a double-skin bell wins hands down for the most heat per load of wood.

Riser less cores are far more dependent on a good chimney, if you can offer a straight vertical run, that goes up above the roof line, then yes they are a good alternative.

Thanks for the replies. I think I'm erring towards the batch box simply for the heat output. But I really like the oven idea. Is it still possible? Just accept you have a really hot oven and just use for flat bread and pizza and stuff like that? If so are there plans available for that?
There is a nice tall straight chimney so that keeps options open. I'm curious how the riserless cores work? I've got my head around the insulated heat riser in a traditional rmh getting the gases super hot and burning all the nasties. How is a similar level of heat achieved without the riser?? Can't seem to find anything explaining the science '

just reading over this and thinking that if it a small house ,that a batchbox style heater would nearly cook you out of the house , so my vote ---and its biased ---is build the walker cookstove ---plenty heat and oven with add on options---some of the explanation and origins of the riserless core can be read on matts   , permasteading.com   site/forums he set up some years ago , theres some info on when he was just starting out on the development of it and another earlier posting on during a stove build that had a riser failure  he noticed and observed from this what might be happening  , and he was then able to work it out and develop it further.