Helix is a customized distribution of the Knoppix Live Linux CD. Boot the CD and you have Helix. That includes customized linux kernels (2.4.27 & 2.6.7), Fluxbox window manager, Excellent hardware detection and many applications. Helix has been modified to specifically not touch the host computer and be forensically sound
Knoppix-STD is a customized distribution of the Knoppix Live Linux CD. Boot to the CD and you have Knoppix-STD. That would include a customized linux kernel (2.4.21 with ntfs rw, openmosix, and superfreeswan patches), Fluxbox windows manager, incredible hardware detection and hundreds of applications. Boot without the CD and you return to your original operating system. Aside from borrowing power, peripherals and some RAM, Knoppix-STD doesn't touch the host computer.