Huh. This is actually a route I hadn't considered. Thanks for pointing it out! I will definitely consider it as I continue researching my next opportunities...
EMBAs are usually part-time over 18 to 24 months, MBAs are full time over 12 to 24 months.
So an MBA naturally has a bigger (as in more in-depth) curriculum than an EMBA. It is also a significantly higher investment in terms of time and opportunity cost, since you're not getting paid during the program.
EMBAs compensate with 1) more experienced participants (so in theory you don't need the introductory classes) and 2) a lot of pre- or post-readings (e.g. my corporate law module was 12 hours in the classroom, but you were expected to have read the 400-page book, and the numerous case studies).
But the bottom line is that you don't go into as much detail as you would during a full-time program. OTOH, since EMBAs are attended by "senior" employees (managers / VPs / directors / etc), and because they're part-time, what you learn is usually directly relevant and applicable in everyday work - and you usually get to work on real-life problems (yours or your teammates) during classes.
I'm not the best placed to say whether an EMBA is considered a "lesser" MBA. They don't really fill the same niche. An EMBA is a career booster if you're say a technical manager and want to move into business or senior management. An MBA is when you haven't started working (or are still junior) and are looking for a fast track to C-level, or to work in a specific area (e.g. consulting, finance, etc.). So basically MBA vs EMBA is mainly a function of your current experience level.
If you want more feedback on my personal experience, feel free to reach out (will update my profile with an email address).