A suggestion.

Although the term corner shop clearly will not do, “corner” as used in your second reference Shop-in-shop & corner : de nouvelles formes de commerce does seem to be creeping in to English, often in the form of “in-store corner”. See some interesting discussion in this related question from Italian to English.
http://www.proz.com/kudoz/italian_to_english/textiles_clothi...

However, this use of corner usually seems to originate from French, Italian or Spanish sources. A possible alternative might therefore be “branded area”. Your second link makes a distinction between “shop-in-shop” and “corner” and the distinction between “shop-in-shop” and “branded area” in English seems comparable.

Le terme corner peut prendre différentes significations dans le contexte marketing et publicitaire.
Le plus souvent, un corner désigne une zone de vente spécifique dans un point de vente physique ou sur un site Internet qui est réservé à une marque donnée.
http://www.definitions-marketing.com/definition/Corner/
Définition : Corner de marque
Un corner est un espace de vente spécifique dédié à une marque dans un grand magasin de type BHV ou Nouvelles Galeries. L’espace de vente est généralement animé par des vendeurs salariés de la marque.
http://www.definitions-marketing.com/definition/corner-de-ma...

In the wholesale or multi-brand channel there are still essentially two main types of layout: the branded area and the shop in shop retailing concept.
The branded area simply means customising an area devoted to the brand and generally does not exceed 50/80 sq. m. It is a relatively expensive investment which aims to “decorate” the fittings and layout of the store through key features such as images, graphics, POP (Point of Purchase) material and decorative accessories.
The shop in shop retailing concept involves full-scale decoration of the sale area that the dealer makes available to the brand. The fittings, which are much more extensive than the “branded area” concept, can therefore include fittings and furnishings, lighting, flooring, photographic images and anything that can create emotional entertainment, and often comes with the support of a specially trained sales assistant.
http://www.arredanegozi.it/index.php/2014/03/shop-in-shop-st...

Wrangler has developed a small-scale version of the shop-in-shop concept it introduced to multiple retailers earlier this year, in order to enable smaller stores to create a branded area which holds up to 200 pieces from the collection.
http://www.drapersonline.com/news/wrangler-rolls-out-shop-in...

FRANCE. French travel retailer Aelia has just opened its new branded beauty concept at Paris Charles de Gaulle Airport featuring separate branded areas for three leading beauty houses.
She added: “The F1 shop is very lively now. We have corners of 20sq m devoted to Kenzo, Hugo Boss, Armani and Calvin Klein. The fragrance brands in these corners are really increasing [turnover] tremendously.
http://www.moodiedavittreport.com/aelia-unveils-fresh-brande...

Liaised with Management, Sales, Retail Marketing and Store Teams to produce and execute branded corners/areas within key strategic accounts in the UK market place.
https://uk.linkedin.com/in/neil-horrobin-2982831b