There are no 'Deeply Reclining' 777-300s, so the website is probably wrong.
From the sticky :-
B777-300, 3-class – 12 aircraft
SkyCruiser in F, Lie-flats in J, New Weber seats in Y, ICE
A6-EMM through A6-EMX
ExpertFlyer aircraft code: 773
So, no private suites in F, but the SkyCruisers are OK.