There are lots of differences. Perhaps the single biggest issue is creation of duplicate and near-duplicate content.
Try to make sure you plans include templates for page titles and META descriptions that are unique to each page.
Make sure the site has one canonical version and that all links go to canonical pages.
And try to avoid generating a lot of pages with essentially no content (photos pages, for example, which without differntating text or at the very least unique page titles and META's, look almost identical to one and other from a search engine's POV).
i have two minor problems understanding your reply. one- when i am using templates to generate titles and metas for a staggeringly large number of pages; i think it is natural that, (more often than not)there will be duplication/or banality/in some cases absolute idiotic phrases in the name of titles and metas. how do i avoid this? do you know any resource that discusses this concept?
two- what do you mean by canonical version? don't get you.
1. Re: Canonicalization - make sure that all links on the site point to the 'www' or the non-'www' version of the web address, totally consistently. Don't swap back and forth. Search engines aren't good at matching th two up.
2. Make sure you don't add session IDs, or anything that might be mistaken as a session ID (like 'sid' or 'id') to your URL query strings.
3. For description tags, if it's too hard to write a unique description tag for every page, at least use the first 2-3 sentences of each article. you can insert those automatically.
4. For the title tags, you really do want those to be editable on a page-by-page basis. I usually set it up a dynamic site to default to the article title, but use the custom title if someone added it.
search spiders cant actually define your site as static or dynamic. That said you can roll up your sleeves and make your dynamic site "look" static. The best way to do so is using .htaccess and mod rewrite. Be aware that even if you have million+ pages you can avoid duplicated title and description tags if the content is actually unique. I always try to have my description tag exactly what it is - "a description". Once I finish writing an article I was sometimes tempted to just copy part of content into description. Now I've forced myself into making them more like a summary by coding my front page to display the actual description tag from database like an article introduction. It will really make you work harder : )