Comparison of XML editors?

Is anyone aware of a serious comparsion/evaluation of the leading XML
editing tools (such as Altova's XML Spy, TIBCO's Turbo XML, Corel/SoftQuad's
XMetaL, etc.) that is of recent vintage? I couldn't find anything on Google
that wasn't marketing blurbs.  I'm aware of the XMLSoftware listing [1] (so
glad that site's back up), but I'm looking for an actual feature comparison.
I'm primarily interested in tools that are IDE-like comprehensive solutions
(XML, DTD, XSD, hopefully XSLT), such as those named, than ones that merely
edit XML. Thanks in advance.

[1] http://xmlsoftware.com/editors.html

- Ken Sall                             or 
- XML Consultant/Author               http://kensall.com
- a SiloSmashers affiliate              http://SiloSmashers.com
- XML Family of Specifications: A Practical Guide [June 2002]
- http://WDVL.Internet.com/Authoring/Languages/XML/XMLFamily/