Russ: It's been a couple of years since I compared the Fujitsu Indoor with their Indoor / Outdoor displays, but I suspect that my observations are still generally valid.
The most significant observation was that the Indoor / Outdoor display was noticeably better when viewed in higher ambient light conditions (think indirect sunlight on a partially cloudy, mid-summer day), but that overall, the two screens were not dramatically different. I think that the Indoor screen seemed a tad bit brighter / sharper indoors... but that was about it.
Neither screen did well in indirect sunlight on a clear, mid-summer day and, of course, were completely washed out in direct sunlight.
I thought that the Indoor / Outdoor screen was worth the extra money because I had the occasion to work outdoors, and even the modest improvement was worthwhile to me. Perhaps another forum member will post with more recent experience...