Haven't used either for years. I use partimage which is a Linux console application. It can back up partitions or complete drives either to another local hard drive or usb stick or to a network drive. It is completely agnostic about what file system is on the partition being backed up
Download System Rescue CD from Distrowatch and give it a try. If you like it it is possible to create a usb stick version which loads and works faster than the cd version and you can use a separate partition on the usb stick for the backed up image.