Yes it better but does it good enough to warrant an upgrade?
Depend on what game he play, he could get as much as 50% more performance or as low as 20%, or even less because he mentioned his card is overclocked.
If you think 20%-40% more performance is good enough for an upgrade for a 5-6 years old card then that's on you, I personally need at least 50%.
Not to mention the buggy software.