There are many differences between the ESV and EXT. Fundamentally, the EXT is classified as a crew cab lightweight truck whereas the ESV is the longer Escalade with four doors and three rows of seats. If you'd like to see all the details, check out this eHow website listing in pretty good detail all the differences between the two models. Source: http://www.ehow.com/about_6401398_difference-escalade-ext-escalade-esv.html
There are four models including Cadillac Escalade, Cadillac Escalade EXT, Cadillac Escalade ESV, and Cadillac Escalade ESV Platinum. Cadillac Escalade is cheaper and much more fun to drive
The 2008 Cadillac Escalade-ESV has 16 valves.
The 2011 Cadillac Escalade-ESV has 16 valves.
The 2012 Cadillac Escalade-ESV has 16 valves.
The 2003 Cadillac Escalade-ESV has 16 valves.
The 2008 Cadillac Escalade-ESV has a V8 engine.
The 2010 Cadillac Escalade-ESV has 16 valves.
The 2007 Cadillac Escalade-ESV has 16 valves.
The 2014 Cadillac Escalade-ESV has 16 valves.
The 2005 Cadillac Escalade-ESV has a V8 engine.
The 2013 Cadillac Escalade-ESV has 16 valves.
The 2006 Cadillac Escalade-ESV has 16 valves.