Not in boot or load times, only in write times. The read speeds are both the same on the EVO and Pro. The only real advantage to a Pro besides write speeds is warranty (the 250GB 850 Pro comes with a 10 year warranty vs 5 years on the Evo). You probably will be upgrading anyway 5 years from now so the Evo should be fine unless you plan on keeping this drive until past 2025.