gynamic or manula header tags

[dumb_question]

I have dynamic header tags controller installed. if I installed the manual header tags contribution http://www.oscommerce.com/community/contributions,207

 

would I have to disable dynamic header tags controller...in general which one is better? Ofcourse dynamic is easy to work with.

 

Also, does "seo metatags" mod offer any additional benefits?

 

Thank you