Do end caps really have a noticeable difference?

[Luked]

With still waiting for my Ti XC to get out of jail I have been buying the various muzzle devices I need for it to go on multiple rifles.
These rifles go from my 223 AR predator gun, 6Arc, My main rifle of 6.5 PRC and also my daughters 300 Blk Rifle.
My wonder is if it is really worth it to buy the end caps in 5.56 and 6.5.
Will it make a huge difference?
The caps are $70 each.
Will I notice a difference from any of these caps if they were added vs just using the normal 30 cal cap?

 

[Fetty Wapiti]

Not worth it! Just run it as is.

 

[dårlig jeger]

In my experience, no. You won't notice a difference. I tried a 556/6mm end cap on an enticer sti and couldn't tell a difference with 223 or 6 creed. Even tried a 6.5 on 6.5 creed.

I think if anyone says they can tell a difference, I think it's placebo.