Break Booster / vacuum Qs.

[Proven]

My main Qs. here is how can you tell if a break booster is going bad? Soft pedal I'm guessing? Any other signs? Reason I bring it up is because I'm getting a weird result with my break pedal. What happens is when I get into full boost and quickly go for the break the pedal has a much stronger feel to it. The pedal also feels like it is raised up more (compared to going for the pedal during normal driving).

Could this be poor vacuum?
Could it be a beat booster?
Could I be crazy?

Things to keep in mind are I did recently replace the main vacuum line going to the booster because the old one slit big time.

Could I have used to thin of a hose or to wide (interior of the hose)? It’s a solid hose so it shouldn’t be collapsing.