actually its not at all better but maybe different , libkrun is far more advanced and has a better support. Wiser is only restricted as a CLI tool as of now.
Why do you call it a hypervisor when it's more like a VMM?
Even the name "VMM" is a quirk of KVM; before KVM, "virtual machine monitor" was another name for a hypervisor: that is, the thing that ran on the bare hardware and provided the virtual hardware interface to the VM. KVM has fairly unique architecture, where a VM is basically a process.
I'm willing to tolerate that "drift" of meaning, because we need a word for the piece of software which converts a process into a VM, and "VMM" is a good fit. But I'd have to really object to the idea of calling such a piece of software a "hypervisor".
If your plan is to make wiser into an actual hypervisor at some point, I'd appreciate it if you made that clear in your README.