05 vs 06 Differences

Could someone take a moment and explain the differences between 2005 and 2006 models? I see in 05 they had S and SE models then in 06 they had X and S models. What, if any, are the mechanical/feature differences between a 05 "S" and a 06 "X" etc? A link or summary of some sort would be a great help as I am looking to by this weekend. Thanks.

http://www.nissannews.com/nissan/2005vehicles/xterra/glance.shtml
http://www.nissannews.com/nissan/2006vehicles/xterra/glance.shtml

And of course, there's our "next generation" section that's all about the 05+ model...

The 05 S is basically the same as the 06 S except
on the 05, the power package and VDC is optional and on the 06, they are standard.

the 06 X is the base model - has power package optional, has VDC standard, steelie wheels and lesser tires

Also in the OR you get the option of Blue/Steel or Charcoal interior and '06 has the locking glove box.