[kapp-controller][carvel] What's the difference between `App CR` create/delete VS `kapp deploy/delete app`

I need to understand what's the difference between deleting an App CR vs kapp delete -a <app>. Because I see former waits for reconciliation to finish before processing delete App CR request.

Scenario details:

• Kubernetes cluster
• Deploy kapp-controller
• Create an App CR in which some resources never reconcile. Ex. if a pod is failing due to the readiness probe
• App status will be in the Reconciling state for 15m(default deploy wait timeout)
• Right after deploy, fire kubectl delete app <app-name>, this will hang for 15m before executing delete request

However, if kapp delete -a <app_name> is fired right after deploy, this runs immediately.

Thanks in advance