I'm a mutt, really. I mean, I do have a touch of Iroquois Indian, but for the most part I'm Irish/Scot. My grandfather is all Irish and he is naturally darker than me (have no clue how he was a dark skinned Irishman), so even without Indian I think I would still have a little darker tone. I get pretty dark in the summer, and that was when that picture was taken, but yea...its really a year round thing for me.
The best way to get a nice looking head is just keep it really short all of the time. That way it becomes the same color as the rest of your skin. Protect it in the summer though with sunscreen until your head is used to that glowing ball up in the sky that it most likely hasn't been exposed to most of your life. It will burn faster than the rest of your skin, and blisters aren't attractive..neither is the flacking skin when it peels. I never used those sunless tanning sprays or lotions, but I suppose they might get the initial "new shave" look taken care of. I would look into the face tanners over the rest of the body ones if you are wanting to skip that first shaved awkward look. But hell....nothing wrong with that pale head look at first. I shows you got b@ll5 enough to lose the hair.
Your other question about the skin on your head as compared to your face. In my opinion the skin isn't the same. The scalp sweats more for sure, and as far as I can tell will produce more oils than your face. That being the case, it very well can react differently. I would recommend going with a sensitive gel/cream until you know how your head reacts. I know my scalp is ALOT tougher now than it was when I first started shaving it. I think over time the exposure does that.
As far as the razor goes, IMO you cant go wrong with the Fusion. The blades are so close together its rare to get a cut since the skin doesn't get in between them as easy. People love the Mach3 also, but I got occasional cuts when I used to use that.
Oh..and finally, I recommend HeadBlade after shaving lotions. The matte one is what I use. Its good for the skin, and it makes your head look nice after a fresh shave. I'm sure there are other products that work the same, but i like to support HeadBlade when I can because they are one of the few out there specifically making products for head shavers. Once they make an adapter to use the Fusion blade, I think I'll start using mine again.