The Corsair SF1000L wins in 5 out of 9 comparable specs, with 1 tie. Its biggest advantage is 12VHPWR Connector (100% better).
Ion+ 2 Platinum 760W wins in 3 specs (Warranty: 43% better).
Recommendation
Choose SF1000L if you want the best overall performance — especially 12vhpwr connector.
Choose Ion+ 2 Platinum 760W if warranty matters more to you.