In reply to LJ2606:
I own both pairs of boots so thought I would give you a quick run down on my experience with them both.
I bought the La Sportiva January 2012, i got about 18 months of hard use out of them before I got the Scarpa rebel lites to replace them.
I still have the La Sportiva's however i only use them for walking now as the rand os starting to come away. They are by far the best pair of boots i have ever worn in terms of comfort, they fit my feet perfectly, light and good grip. Build quality on them has been second to none, the rand and sole is quite worn but that is because of the heavy usage (about 100 munros and long walk ins worth). They are not the most waterproof boot but you don't buy them for that, for scrambling, easy winter walks and general mountain shenanigans then they are superb.
I decided to replace them with Scarpa rebel lites as Go Outdoors had them on offer. Apart from a dodgy insole the build quality of these have been great. They are a slimmer fit than other Scarpa's almost as good as la spoetiva but not quite. I would say the standard insole on the la sportiva is fine, the Scarpa standard insole isn't so good and this boot really needs a superfeet type one for the best fit and comfort. The boot has the exact same vibram mulaz sole as the la sportiva so i expect the boots to have a similar life span.
To surmise, if i had to choose one again it would be the la sportiva. The fit is better, the standard insole is better, when traversing a steep slope the outside of my foot can rub slightly in the Scarpa. There is very little between them, generally the la sportiva's are cheaper as they are more widely available and older so I have seen them down to £157 on a uk website. I paid £190 for the la sportiva's in 2012 and £183 for the Scarpa's so in November 2013. Try before you buy, hope this helps!