That's the basic.
EvangelIST is the one that proclaims the witness to others ... a preacher. John, the baptist was a preacher .. an evangelist.
(an) Evangelical is someone that believes in the message, but generally speaking, isn't really active in the spreading of the Gospel. IMO .. it was a combination of heathan and evengelical that attended Herod's party, watched "Solome does Herod" on the Spice channel, and tsk tsk'ed that John just wouldn't 'tone it down' and be a little more PC. ..... for his own good, of course.
So
anyone in my opinion, that uses or utilizes EVANGELICAL in any way (and especially a 'mega church') is a wolf in sheep's clothing and is to be exposed.
Ever since Rick Warren dissed Fundamentalists I've figured out I'm a fundamentalist and not Evangelical. Big hearted Rick who preaches about loving annoying people like Jesus would, lumps us 'fundies' in with terrorists as one of the biggest enemies of the 21st century.
Getting us kicked out of my church (for rebuking our Warren-emulating pastor-weasel) was the best thing I ever did!