This is actually the same. Bum means without spending money, and SEO is cost-free, as long as you are not buying backlinks, or some sofware, etc. So yeah, that's the same thing.
BUM (article marketing) is just one part of SEO ....There is a lot in SEO. BUM uses articles as the main technique ....whereas SEO consists lot of stuff.
wow thanks everyone for explaining that i was also not knowing the difference, i was thinking that squeeze page is bum marketing so foolish of me... but well thanks Madman340 for starting the thread .... now i know the diff