In Q3 of 2013 (to match the iCV2 numbers...)
http://www.evilhat.com/home/q3-sales-2013/
FATE Core sold... 2059 copies. It's lifetime total was 11873 copies at the end of the quarter.
So, in terms of number of copies of rules, Timewatch came close, but did not beat, FATE Core for number of copies sold. Timewatch beat the stuffing out of the effective revenue, though - a base copy of FATE Core costs $25, so that's about $51000K in sales for the quarter, where Timewatch effectively had over $100K in the kickstarter.
There are points where the comparison falls over, of course. The Timewatch Kickstarter is a one-time thing, while FATE Core is a longer-running model that has already exceeded the kicksatarter by a factor of two in dollars. And FATE Core's had apparently some really weird swings in sales - Q1 was 9600+, Q2 was 120, Q3 was 2059 units. So, maybe I picked a bad example for comparison.
And, of course, Fate Core's own Kickstarter raised half a million dollars. Different period, though.