Are these sentences correct

Desafinadoboth sentences have the same meaning?

Not really. The first sentence implies that Windows 8 is very different from other operating systems. (The "how" is emphatic.) In the second sentence, the speaker simply wanted to explain the differences. (The "how" means roughly "in what way(s).")

Desafinado Which is better and both sentences have the same meaning? Thanks in advance. I explained how different Windows 8 is from other operating systems. I explained how Windows 8 is different from other operating systems.

Desafinado,

I counted 18 copies of this same post. It's going to take a long time to delete them all, so you are causin

Hi ozzourti,

Thanks for your detailed explanation. I understand the difference.
I really appreciate your explanation as nobody around me can teach me as you could.

Hi CalifJim,

I did not post 18 copies of the post by myself. Do you mean that I posted the similar topic that someone had posted? If so, I want to apologize what I did. I want to avoid doing the same thing as I really appreciate all members here.
By the way, I searched with "how different" on English Forum and I did not see any other topic other than mine. So I do not know how to find

DesafinadoI did not post 18 copies of the post by myself.

Strange. I wonder what happened.

Thank you, CalifJim,

I suppose the reason why 18 of mine was shown on English Forum was due to my PC.
In fact, these days, when I posted my entry on another forum, I noticed that two of mine were there, although I just clicked once.
My PC has been getting slower and slower these days. So I was thinking to reinstall my PC tomorrow.
Thanks for letting me know about this. When I

Desafinadodue to my PC

That's believable. I have trouble with my PC sometimes, too. (No multiple posts, though, thank goodness.)

CJ