ArcScene isn't included with Explorer Desktop.
If the state you are scouting has the info available in KMZ format, GE is a good choice. It's quicker and the 3d is better, easier to use. If most of the info is in shape format or FS maps are NAD83 geo referenced, ArcGis Explorer will make it easier. So far, over 3 states I have looked at this year, Bing basemaps are much clearer that the their GE equivalent. Unfortunately, native Bing support is leaving ArcGis Explorer but can be added for no cost.
I have both on my box but end up using ArcGis because of the available datasets. Use what gives you the best results.