Why is my brother so different from me?

share the same parents

to be brothers or sisters (siblings)

in terms of

used to say which part or aspect of a topic you are talking about / с точки зрения, в плане

in this case

in this specific situation / в данном случае

according to research

based on what scientists or experts have studied / согласно исследованиям

a suit and a tie

formal clothes, usually worn for work or events

one possible reason

one idea why something happened (not the only one) / одна возможная причина

do this instead

to do one thing in place of another / сделать это вместо другого

quite strict

having many rules that people must follow / довольно строгий

compare with

to look at two things to see how they are the same or different / сравнивать с