i would say knopix is more stable, but i have never used it so i cant say for sure. as a general rule, linux distros dont freeze 1/10th that of a windows system. i personaly use xandros. its a modified debian. only 600 mb. runs liquid smooth even on slow computers. i ran it on a 600mhz pentium3 and it was lightning fast. i was amazed, so i had to put it on my other system. plus, i have never, not once had it freeze on me. just my 2 cents tho. theres the obvious software compatibility problems, but if ur asking, you already know that. good luck