Akro Can confusion

Sorry, i know there is a lot of talk about this but I am still confused
Are the round titanuim slipons with Y pipe the same as the oval ones with the carbon tips, except for looks? There is quite a difference in price.

Then there are the Evolution slipons that only appear to fit the titanium header pipe. Are they more open, louder...what?

Thanks for rehashing this.

I can't judge for the other, but the full system is pretty sweet. But expensive i only scored it because of an ordering error. Without the killers in it is pretty loud. Slip- on of full system... The benefit is in the weight saving, like 9-12 kg up at the seat. The bike is so much more maneuverable.