More than likely no.
There may be a few changes, but you can get by with it, esepecially if there is a big difference in price. If the prices are pretty close then I would get the most recent one available.
The Blue Chart chip in my 2002 Garmin 182c isn't any different than my 2007 Chart Book, 2007 Navioncs Platinum (for my Raymarine C120), or my 2006 Navionics Gold (C70).
Of course things could be different in your area.