Is this used only in your laptop? If so, I'd probably say it's not worth it, unless you're looking for more space then I'd surely spend a little extra for Sandforce vs the "cheap" Kingston (which I don't think is all that much cheaper?)
The biggest improvement will be in small file random reads and writes which will affect general system snappiness. Sandforce excels in this regard.Going from a western digital black to a 64 GB ssd was a huge improvement in responsiveness (boot time, app launch, search, etc). Now how much improvement is one expected to notice going from a low-end kingston SSD to a newer 120GB Sandforce drive?