Did anyone read the novel?

yep i read a bit there twins and his brother was a guineas introvert
and he was an athletic extrovert he was the older one out of the two. after his brother went missing he went to military for like 3 years went to africa and was a lieutenant there. then came back because hes mom pasted away then he found his brothers stuff. etc you now the rest (=・ω・=)

They do have similarities, since they are fraternal twins (I would lean more to identical fraternal). They have opposite personalities, though as joker4515pharoh mentioned, so they may come off as totally different. Specially the aura/personality they emit.

Here's the page where you can view them closely, Yeon-woo is looking at his younger twin's picture after coming back from his tour of duty. (You may need to scroll while comparing)

http://www.mangago.zone/read-manga/ranker_who_lives_a_second_time/nbt/mpn_chapter-1992712/2/

Here also is when Yeon-woo gave his brother the pocketwatch (but the last name(?) was misspelled, lol) when they were younger.

http://www.mangago.zone/read-manga/ranker_who_lives_a_second_time/nbt/mpn_chapter-1992712/4/

Yess, thank you for telling me.
I have bad memories, all I remember about his brother face is the first cover we had, the badass with bloody bath. And I thought he has brown hair. So... That's when I think they are not alike (=・ω・=)

http://www.mangago.zone/read-manga/ranker_who_lives_a_second_time/nbt/mpn_chapter-1992712/
He looks like have brown hair, isn't he?

Cause of it, I'm reread now. And It's feel good to reread (╹◡╹)

Yes, the coloring does make it seem so. We could also attest that the scene may have been done in that way because of a bigger scene and the lighting made his hair brown. You know, like in movies or in an anime - they have this close up of the character and the light surrounding them affects how they really look like.

So, it's understandable how some confusion may occur among readers.