Unless they've changed them much, an RHCE means you can walk on water, raise the dead and do other useful things. An RHCT means you're awfully darned clever, but you're more likely to sink a little when you hike across the lake. It was designed to acknowledge competence for people who weren't up to the full RHCE. Last I heard, however, there were no pre-requisites for the RHCE other than the ability to demonstrate that you had the practical skills to do what I used to do on a busy day.
Unfortunately for my, I was doing them for OS/2. Linux is more enjoyable.
An IDE is no substitute for an Intelligent Developer.
From what I understand if you do the RHCE and "also can perform RHCT stuff", you get both RHCT and RHCE at the same time. If during the exam, you can only do all RHCT stuff, you get RHCT. If you can't do some RHCT stuff, you only get RHCE. Of course that last scenario is very unlikely I think cos RHCT is a subset of RHCE.