imbilly
Thanks all for your input. Answering bb's question, Sloan EMBA is relatively new. It didn't graduate its first EMBA class until 2012. That's why it's ranked at #15 by US news and not even ranked by other agencies. I believe it's fair ranking will be #5 to #8 when it's mature. IMO, Sloan EMBA curriculum is very different to Sloan FTMBA. Sloan EMBA doesn't offer as many electives as FTMBA, and it's class days is relatively fewer than Wharton (99 days v.s. 120+ days).
I would concur with your assessment of their eventual rankings... that does explain why I could not find much info... and as a rule the EMBA reputation is usually defined by the FT program; not the other way around, so your position, ranking, ROI is pretty safe from that standpoint.
As to the class days, it may be a different teaching approach/method - more of group work and discussion between the classes vs. more class-focused approach. Something to research perhaps.