I probably wouldn’t describe it as similar, but virt-manager is fairly simple but powerful at the same time (like it will let you expose more advanced KVM/QEMU features like PCIe passthrough and similar).
But like the other guy said, gnome boxes is very straight forward and probably more similar in it’s simplicity.
They both use QEMU + KVM, so you can have both virt-manager and boxes installed at once, and I believe virt-manager (probably boxes too) easily let you use existing VirtualBox .vdi files, if you’ve got an existing VM you want to run. Also like I said before, KVM is already mainlined into the Linux kernel, so you don’t have to install sketchy kernel modules and stuff.
I’ve only used VirtualBox once though, so I can’t really compare them.