MobaLiveCD is a free, open source application that allows users to test drive Linux directly from a CD or USB drive without installing it on their computer. This allows users to experience Linux without any installation or configuration, making it perfect for people who are new to the Linux operating system. It also works well for experienced users who want to try out different distributions (types of Linux) quickly and easily. MobaLiveCD allows users to boot a Linux system directly from a CD or USB drive, so that they can explore the operating system without making any changes to their computer. It also gives them the option to save their changes to the USB drive or CD, so that they can use the same settings the next time they boot up.
MobaLiveCD tells you if your USB is bootable. Virtualbox does not.