i prefer the first 8-power map.
France is forced to find an ally, either england in the north (to secure belguim, and give england a figthing chance against germany) or italy in the med, as together they have many centers to gain from spain.
Alternatively France coudl ally with spain against italy or against england (both sev and bre can build fleet and send them into MAO)
The 5 center spain will definitely be seen as a threat by france, which means i assume alliance against it will be more likely. (BTW i'm assuming Spain starts with A Madrid, F Seville, A Barcelona - but the alternative of A Sev and F Barc would make a huge difference)
French openings, F Bre - MAO threatens Sev, Por and Mor (where a Spanish fleet begins is vital, as being able to bounce this move has consequences) If france decides to push war on spain, (paris - gascony, mars - barcelona) then spain will be hard pressed to do anything other than defend (an opening of madrid to bil would allow for the army to take portugal, but with france in gascony risks losing barc; meanwhile barc is stuck holding out against france in any case, opening to gascony makes decent sense - but again a fleet in barc strengthens the french hand while weakening spain)
Assuming A Barc, F Seville, Sev - MAO can bounce brest and then take portugal, meanwhile Barc - Gascony, might lose to A mars S A Paris - gascony, forcing madrid to support barc to hold.
Alternatively Spain can try to make a deal with france where F Sev opens to west med, (threatening the italian build of tunis) Madrid opens to Bil (to take portugal while defending against the possibility of a french opening to gas)
In the long term, a weaker france means germany and england have to see each other as bigger threats, wiping out france early may be a viable option (but virtually guarentees a six center spain growing in france's place)
It does make France like Austria, while Spain is similar to turkey, though i suspect turkey's 4 center box is harder to break into than Spain's 5/6... MAO being vulnerable to attack from the north.
There are lots of variants like this out there,
http://www.xcelco.on.ca/~ravgames/dipmaps/aberration_ra.gif
http://www.diplom.org/Online/maps/1720.gif
http://www.diplom.org/Online/maps/AE.gif
http://www.diplom.org/Zine/W1995A/Mous/modern.gif