So with the suggestions posted here, I would install like this:
1. Robert's Female or AMB (for male)
2. Detailed Normals where available (might be included in AMB, not sure)
3. IFT
4. F-Inev
5. OFF
Is that correct?
I think so - Yes the orders correct, but I haven't tried AMB yet (was tempted but since Malonn has started doing a BAIN wizard for it, holding off until thats done), so for instance if it has its own set of age maps custom made for AMB then they will probably be better than IFT. But if its like any other Rob male compillation with just different body choices and stock clothing/armour, its good.
If you throw Rob Female in that mix, then lose F-Inev - F-Inev being a HGEC compatible texture not Rob Female. Rob Female has its own textures, I remember a few conversations where graphic artists prefer working with them.
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On to the experiment .... (open these up in different tabs to compare)
First http://www.bild.me/bild.php?file=1257243Untitled.jpg
Result http://www.bild.me/bild.php?file=4824899Untitled1.jpg
Next http://www.bild.me/bild.php?file=5435878Untitled2.jpg
Result http://www.bild.me/bild.php?file=1172412Untitled3.jpg
With just the Normals, they do give better definition (and I did use the large texture copied to all races as per the readme so that all races have the best defined normal map, with no compression artifacts), and getting closer to the slight neck seam on males you get with Rob v5 and OFF.
Heres the but - See there is one problem with the test I did, if I am using new textures combined with OFF, then really to be sure (and I have not got the time), as per the_philanthropy's instructions I should have started the game anew, to give the game chance to re-generate all NPCs' with the new combination of textures and OFF.
So, maybe those last bunch could have been as good as what I normally see if I had time to start a new game from scratch, giving good male neck seams with more muscle definition - Or, they are only compatible with Rob v4 setup, not my Rob v5. Those normals look like its worth a go from the start though. Again YMMV.
Note also, the above was on my laptop again, so could have looked better with all bells and whistles on the desktop.
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Edit: Cheeky picture censored