No. They are not one and the same.
Distribution is exactly that-distributing your content on different platforms. This includes social media, free doc sites, slide show distribution sites, forums, email lists, paid ads, etc.
Marketing is all about building relationships and using those relationships to earn backlinks or prequalifying audience members to TRUST your brand.
Too many 'marketers' don't hassle with relationships because it takes too much time or is uncertain
The problem? If you are like most marketers and you just focus on distribution, you're doing what everybody else is doing... You end up FIGHTING OVER and STRUGGLING for CRUMBS...
Build relationships instead. Find the influencers in your niche. Collaborate with them through collaborative blogging, AMA sessions, Q+A content, co-branded social media campaigns, the only limit is your imagination.
Get this channel going and you'll be surprised how quickly your content can gain traction later on.