I'm surprised you can't find an answer, but I also think you are putting too much importance into it. If it was me, I'd get the SATA3 SSD anyway. Prices aren't much different, and it will still be much faster than what you have no regardless of your laptop's controller. Then, you'll always have the drive to be able to reuse in another computer later on, if needed. SSDs bring several benefits to the table, so I'd just get the best one that fit my budget.