T-shirt vs Shirt

The differences between a t-shirt and a shirt are, 

• Base fabric of a t-shirt is knitted using a knitted machine, where as a base fabric of shirt is woven using a weaving process called power loom, handloom or auto loom.
• Dyeing process for a t-shirt knitted fabric is different than woven fabric, which is used for shirt.
• Generally, a t-shirt feels more airy and stretchy, where as a shirt feels more stiff.
• Usually one tends to wear a t-shirt for a casual occasion where one wears a shirt for a formal action.