What are two things that are way different on the first glance, but are, in fact, very similar when you think about it?

Me and you.
Him and her.
This person and that person.
A black man and a white man.
An Israeli and an Arab.
A Clinton voter and a Trump voter.

^That’s obvious, give me something stronger.

^You’ve got to be joking.

^Not at all. I knew all of that long ago. I need something more mondblowing.

4-stroke-cycle 6 cylinder heavy duty Diesel engines. Like Cat, Cummins, Detroit Diesel, to name 3.

(This is regarding an article-https://msu.edu/~jdowell/miner.html This article does detail some things that may be disturbing and I briefly mention them in this comment)
This is about a group of people called the Nacirema, who have a heavy belief in magic and do a lot of rituals that many would consider torture, such as drilling holes in cavities and filling them with magic supernatural substance. The “Holy-mouth man” Who can be seen as a dentist in America’s culture, just not to the extreme.
Their name “Nacirema” is ”American” spelled backward
If you read the article it talks about a place where the sick go to get “healed” (basically getting tortured) that they call the latipso, backward, it would read ospital which is very close to the word Hospital. It also talks about how the children were scared because they saw it as a place to die or get tortured, and many young kids now are scared to go to the hospital in fear of shots.
If you read the fourth footnote on the bottom it says
“According to Nacirema mythology, their nation was originated by a culture hero, Notgnihsaw, who is otherwise known for two great feats of strength – the throwing of a piece of wampum across the river Pa-To-Mac and the chopping down of a cherry tree in which the Spirit of Truth resided. ”
The cultural heroes name spelled backward is ”Washington” and there is a myth about him cutting down a cherry tree.
The article also talks about a ritual men do where they scrape and lacerate their face with a sharp object, which can be seen as shaving.
They also talk about how every lunar moon the women bake their heads in an oven for an hour, which can be seen as the machine women use when getting their hair done.
These are some similarities in cultures that are complete opposites in practice, but when you look deeper they are very similar in the overall picture.

^Obviously made up, but still quite interesting to read. Sufficiently advanced technology does look like magic, and we really are not different from a tribal community. Now that is mindblowing.

Religions. Every one thinks they’re the right one and all the others are wrong.

Human beings and other animals.

@LuckyGuy also, all of them ate focused on achieving some sort of salvation and peace, and many of them offer love and respect as solution, even though they never stick to it. In other words, I know about religions being all the same. Next!

@flutherother Humans are animals.
@kritiper Sorry, I don’t know what are you talking about. Would you explain? I am not familiar with motors.

*are focused on achieving…..

@Sneki95 That’s what I meant by ‘other animals’ it’s just that we don’t always recognise it.

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The above lines appear to be of different lengths, but their lengths are equal.

A lump of coal and a diamond. They’re both composed primarily of carbon, but a diamond is super-compressed carbon.

The Diesel engines are all basically the same. But their outside appearances are different, as are the color of paint on them.

Apple and orange. There is scientific proof that they are similar in some ways, or at least comparable

Orthodox monks sound quite like black metal, don’t you think?

Trump and Saddam Hussein.