"Named Users" vs. "Concurrent Users" Lic.

I am trying to find out if the use of "Named User" Lic. vs. "Concurrent User" Licenses is standard fare for the database industry.

We are trying to get an upgrade to our Oracle licenses but there are drastic price differences between the two types of licenses. Oracle says this is standard. I am trying to find it if is true with other vendors. We may seek to "Jump Ship" with Oracle if other vendors have better deals.

Thanks!

-- 
Harry Skelton
United Systems Security Enterprise - USS Enterprise