It all depends on your application. The Fujitsu is basically TOYOTA OEM. You shoudl try the Nav Software and Interface to see what you like. You should try them both to see for yourself.
Here are my comments on A/V Side of things:
Much better warranty on the Eclipse. 1 Year for the Eclipse 90 days for the Kenwood. That tells you something right there. The build quality is more OEM than the Kenwood. This is why installers prefer them as well. They like to use products that last and they don't want customers comeing back with issues. Most aftermarket audio product is crap. This is why OEM's source stuff that will last 10 years. Problems are associated with the car brand and they cannot afford that. The Ecliupse is what the more reputable car dealers install as afrermarket and Fujitsu makes severl of the better OEM Systems.
3dbf better FM Sensitivity on the Eclipse compared to Kenwood. That is a significant difference.
15watts RMS and 50watts peak on the Eclipse and 22watts RMS and 50 Watts peak on the Kenwood. This indicates to me better dynamic range due to a better power supply or more concervative taing or both on the Eclipse.
3 EQ Bands on teh Eclipse and 7 EQ Bands on the Kenwood. However, I never use much if any EQ ... as EQ = Distortion. In the studio, if the engineer puts more than 2 to 3db of EQ on ANY signal ... all they have done is add distrtion. You cannot shape sound electronically without adding distortion campared to the source.
Same as above for those "enhanced" surround modes such as System Q-EX, System E's, Circle Surround, Tru Bass, etc. All garbage.
Eclipse Signal to Noice 90db. Kenwood does not even rate their Signal to Noise Spec.
Kenwood has an extra set of A/V Inputs as well as Aux and USB Inputs on teh rear of the Radio. Ecliupse has one A/V Input.
Kenwood comes with a wirelss remote. Optional / extra on the Eclipse.
Eclipse has green lighted display. Kenwood has Blue.
Eclipse has healty 5V pre-amp output verses Kenwood's 2V Pre-Amp output.
Also, read the features, reviews, etc. Kenwood has some interesting features liek steering wheel interface if you have that in your vehicle while the Fujitsu has Gyro Nav feature that keeps the map on track when sattelite signal is lost.
Both are good units...see if you can find a place where you can play with them both before purchasing.
Personally, my opinion is that the Honda / Acura automobiles have the best Nav Systems by far. I have not figured out who makes their units yet. I think it could be Alpine. However, the latest generation Fujitsu's ... installed in the 2009 Toyota Camry I believe, are suposed to be the bomb. I am not sure if they are out yet for consumer / aftermarket purchase.
Ok, I'm leaning more toward the Kenwood deck, due to its Garmin GPS and more available options. One more question regarding the Kenwood though, it states that it has a 2gb memory, is that enough to run a comprehensive GPS system? The Eclipse uses a DVD, which if I remember correctly can hold up to 6gb of information. Will 2gb be enough?
EDIT:
Would some of you check through these spec's and tell me which sounds better? I'm trying to get unbiased opinions so I don't make a bad purchase
Kenwood DNX7100 DVD navigation receiver at Crutchfield.com
and
Eclipse AVN6620 DVD navigation receiver at Crutchfield.com