I've downloaded Wayfinder 7 for a five day trial and I will consider whether to buy it or not. It costs about €165 for all of Europe (inc Swedish VAT) (or all of the USA). I compared it with Maps 1.0 which is free as long as you don't need voice prompts. With Maps, if you do need voice navigation, then you need to pay a monthly rate, but you don't have to do that with Wayfinder. The price for Wayfinder is a lifetime price (you can change mobile phone and use Wayfinder on the new phone instead), but you need to pay for upgrades. Eg. an upgrade from version 6 to 7 cost 49-79€. The pricing for Wayfinder is much simpler - you just use it everywhere - but it is also more expensive if you will only use the gps a little for driving.
I used both applications on the internal gps on a Nokia N95 of course.
First of all, the applications are pretty similar in graphics. Wayfinder has a little more contrast between roads and surroundings which I like. But no big difference.
Wayfinder has some basic buildings in its maps, Maps have none whatsoever. Wayfinder uses the maps by Tele Atlas and I think that Maps uses the maps by Navteq. All roads I expected were there.
Maps scrolls very smoothly in different directions and zoom. Wayfinder stops now and then when you move the cursor which is less nice, but it's not terrible.
Wayfinder is getting a lock much faster. At one time I had it down to less than 10 seconds, but then Maps was quite fast too (30-40 seconds maybe) at that time. At another time, Maps took five minutes and Wayfinder one minute until it was completely finished. They operate on the same hardware so I can only assume that Maps is way too cautious before presenting me with a position. When Wayfinder gave me a position it was accurate too. I'm actually sitting inside of my apartment a few meters from the window and Wayfinder claims to have a gps lock now and then. I've never seen that with Maps.
I find the initial menu in Wayfinder a bit confusing, but I can live with it. The options you expect are there. Wayfinder 6 had two problems that made it unusable: if you were at one position it turned all the time because it thought it detected a motion from me. And the voice instructions were way too frequent - annoying. Wayfinder 7 fixes both problems.
In Wayfinder you're stuck with the language you choose from the beginning. In Maps, you can download many separate languages that you then choose from.
Both programs can operate from downloading data traffic in the moment as well as you can download maps. Maps need a pc (a mac is not ok) and a special Nokia Map Downloader. I don't know yet how you download maps to Wayfinder, but I know that you can.
Both applications have some sort of 3D view, but they both seem quite simple to me. But maybe, they don't have to be fancier than that.
Wayfinder has traffic info and local wheather info. I don't think that Maps has those things. I didn't find anything about speed cameras in Wayfinder (and certainly not in Maps).
I haven't tried driving a car with these applications, which you probably expect that I would. I'll try that tomorrow.