Akrapovic and Yoshimura slip-on sounds same?!

[Suzanita]

Hello everyone. That's my first post btw.
So I am a proud owner of 600 cc K1 which currently have a Yoshi slip on. When I bought it the guy also gave an Akrapovic and original exhaust. Yesterday I decided to change the Yoshi can with the Akrapovic one... and guess what they sounds exactly the same.
My questions are:
- is that normal?
- or both of them are shitty replicas?

 

[Underdog]

Do you have any pics of them?

 

[Suzanita]

Here they are

 

[Underdog]

They look genuine enough in the photos, akro usually acid etch the name & logo on the end cap and although they might sound the same it's more to do with the gas flow

 

[Suzanita]

Thanks Underdog!
And roughly how much you think they will cost to sell?

 

[Underdog]

Generally slip ons go for £100 upwards for a good condition one. Check ebay or facebook marketplace to see rough prices. Don't forget to get a quote on postage unless the buyer is collecting