a stool is a seat with three or four legs but with nothing to support your back or arms while a chair is a piece of furniture to sit on with a back, a seat and four legs
On a hard chair
try adjusting your chair height
there is no difference
If your knees were positioned at the back, a chair would likely have a unique design featuring a contoured backrest that accommodates the knee placement. The seat would be shorter and possibly angled to provide comfort and support for the hips, while the backrest would extend higher to support the upper body. Additionally, the chair might incorporate a forward-leaning design to allow for ease of movement and balance, ensuring that the user can sit comfortably despite the unconventional knee position.
What is the difference between M1 and M2?
There is not a lot of difference between a vanity chair and a vanity stool. A vanity chair usually is a chair style with a higher back and it is stationary. A vanity stool usually has no back or just a low back and often will swivel also.
Chair.
Nothing a chair
stool
stool
A stool is to a counter. Just like a chair is typically paired with a table for seating and dining purposes, a stool is commonly paired with a counter for seating in kitchen or bar areas. Both stools and counters are often found together in these settings, making them analogous to chairs and tables.
Bar.
A stool pigeon.
a stool
Executive chairs and drafting chairs differ mostley due to the height of the chair itself, the drafting chair being tall as in a tall stool making the worker at the drafting table more comfortable being at the same height as his or her working space.
A stool or a Chair
mule stool I think