A lion head at the front of an arm is the one piece of carving on a chair that will be touched every single day, and that changes how it is cut.
Decorative carving is worked for the eye: undercut deeply, left crisp at the edges, detailed to the last whisker. Do that on an arm terminal and the result is uncomfortable to hold and vulnerable to knocks - fine detail at the front of an arm is detail waiting to be broken.
So our artisans model these heads for the hand as much as the eye. The mane is cut in broad, rounded locks rather than fine strands, the muzzle is softened where a palm would rest, and the deepest undercutting is kept to the top and sides where fingers do not reach.
Look at the head straight on and it is a lion. Put your hand over it and it is a smooth, comfortable arm terminal. Getting both from one piece of timber is the actual skill, and it is why the carver is given the finished chair dimensions before starting rather than working from a drawing of a lion alone.