
Link to chap 89 :D ( i found in on a website and the translators did a pretty good job)
https://zinmanga.com/manga/survive-just-like-the-heros-wife/chapter-89/

count clone is like a clone of duke rosea i cannot tell them apart- someone help me tell them apart and tell me who the heck sent that magician person to kill the twins

Got it. Main difference is mustache and personality.
Mustache = confident scheming boss = duke
No mustache = cowardly underling = count
Mustache is the guy that hates the emperor possibly cuz he liked the emperor's wife. His son is also the guy who misinformed the mcs that the emperor hated them.
No mustache is the father of scar face and he just follows the duke's orders.
Mustache(duke) uses cowardly no-mustache(count) so that the brothers' attention would be on no-mustache(count) while mustache(duke) tried to minimize any suspicion and get closer to the twins.
Tbh, I just labeled them as bad guys cuz idk if the difference really mattered to the overall plot, but ur comment made me curious xD

for a manhwa that is less than 100 chaps but is completed it's quite decent, i enjoyed reading though i dropped it once then read it again but i regret dropping it the first time now haha, but it certainly is a good one ^^ (the pace is just right for me as the ending didn't seem rushed and everything was explained)
the title does not match the plot and the cover does not match the story art and i don't know where the story is even going BUT it's still good like the father and daughter relationship and how cute she is but i guess that about it