His strong point is his strong sense of responsibility.
この計画の長所と短所を比較しよう。
Let's compare the advantages and disadvantages of this plan.
She works in a way that makes use of her strengths.
This school provides education that helps students develop their strengths.
I compared the strengths and weaknesses of the two proposals.
長所 is a general, personal term for a good quality, while 特長 is more formal and often used for a distinctive strong point of a product or system.
長所 is a general, neutral term for any strong point, while 身上 suggests a defining quality someone prides themselves on or is known for.
長所 refers only to a strong point or merit, whereas 長短 covers both the merits and demerits together.