Are the chargers different ?
 

Is the Combat charger
http://i16.ebayimg.com/01/i/00/08/72/8d_1.JPG
different from the car charger?
http://i8.ebayimg.com/01/i/01/66/a3/79_1.JPG
Are both needed, or is it just label differences?

Yes, the chargers are different, the top one is for Combat Digi Q only and the bottom one is for Digi-Q and Digi Q R cars. Also on the site where that picture is it specificlly says and I qoute "Does NOT work with Digi Q
Formula or Konami Digi Combat
tanks" Hope this helps your decision on what you need!:D

thanks... I just wish ebay prices for those wasn't so high. Ever get the feeling someone's boosting prices?

No not at all, for there complexity they are rather cheap. I looked inside the 4 bay charger myself and was very surprised to find a big circuit board with a couple of chips and sophisticated wiring. To me they arent really that expensive but to other people they are. You get what you pay for:D

and save a lot of $ on batters!

hehehe, yes that too! I have already saved maybe 50 dollars on batterys. The charger is deffinatly worth the sum of 30 dollars. Its already payed for itself!:D