xanax you'll go into straight seizure. i've WDd from both, xanax is worse. if you're on a high enough dose of klonopin you'll end up in the ER if not properly weened a few times
xanax sucks, it makes you groggy, eyes heavy, makes me mean atleast, and you can tell when you're coming off it, making it addictive cause you go straight into panic attack and need another one asap cause your anxiety hits you at once.
i take klonopin everyday and it's the best benzo imo cause it lasts all day due to it being TR and it has a long half life. i'm prescribed 4mg daily though but i need about double that some/most days. both are very addictive and your tolerance will build FAST.
as far as danger i've eaten over 10mg of both before and some people on here have eaten 20mg before and functioned. one guys girlfriend at 45mg of klonopin and did heroin and lived. blacked out, but functioned. i've never blacked out but it all depends on your tolerance. someone with 0 tolerance can eat a .25 xanax and sleep all day. you'll go to sleep before you die although benzos do slow down your CNS it's hard and stupid to OD on just benzos alone, alcohol needs to be involved for bad reactions