Get SPWeb from Site or from SPContext

Hi,

i am trying to get the SPWeb object,

i can get it using the Site:

• Statically 
  using (SPSite site = new SPSite("http://url/"))
           {
                 using (SPWeb web = site.OpenWeb("NameOfSubSite"))
                 {
  .....

}

}

but using this way i should enter the URL of site when get the SPSite and the name of subsite when get SPWeb usingsite.OpenWeb

• Dynamically
  by use the SPContext: SPWeb web = SPContext.Current.Web;
  here i can get the current web without enter the URL of site nor the name of subsite

the question is what is the best way to get the web of current site, and what is the difference between the 2 ways.

Thank you

Regards