I would say SV is better all round than MW, there is no real natural vs technical divide here (whatever that is)
For me in racing speed is directly correlated to bravery, if one is on the motorway going flat out, the braver you are the longer your pedal stays glued to the metal. SB has this in spades, so does MW but SB also makes less mistakes has less off days and appears more committed. I think we are privileged to see the bravest drivers in the best cars but SV seems to bring more of a cutting edge than MB
The area I think MW wind is in temperament under pressure, although SV has proven the usual detractors wrong several times by coming through the field without losing his rag there is still the need to suspect him of being weak in this area, he didn't help with the Karthekeyan affair as his rage clearly got the better of him and detracted from his race
However he might improve on this
What I find funny is how those all over themselves last year to hail him a model character, the perfect role model for kids, a suitable groom for Bernies daughters, the second coming of the lord etc etc have now gone silent after one small incident or even worse taken it as a chance to slaughter him
I think so far this season he has answered all questions apart from middle fingering antics, MW is good but just not good enough or consistent enough and can't seem to get best out of a crap car, mind you it could be that SV has the same Button weakness of needing a perfect car but I don't think so, I think the kid is a natural and so could get the best out of a tractor
Finally, even though SV has lost the 'magic button' one lap boost given to him last year by the regulations and team, he is no worse over the race and I believe still capable of thrashing MW when he gets the hang of the new regime