Generally, there are 2 different cabinet styles:
Frame-less and Framed.
So what are The difference?
This is an example of traditional framed cabinets with insert doors: the doors are installed inside the frame = flush. Usually, they come with exposed hinges.
This is the most Luxurious type of cabinetry. It takes a lot more time AND skill to build a kitchen like that because frames and cabinets are joined together and Then painted as a one element.
There is no tolerance for mistakes - if something is off by 1/16'' - the doors will be scratching the frames while closing.
The installation is also very time consuming and requires tremendous amount of skill to do everything perfectly.
As a result of the above, traditional Framed cabinets are the most expensive cabinets on the market.
Frame-less kitchen cabinets on the other hand, are build completely differently.
Basically, its a cabinet and a door.
The doors are installed with concealed hinges mounted directly to the cabinet box - and together with matching side panels that create that Sleek modern look that many people like.
All modern style kitchens are based on frame-less cabinets.