Yup, I think it is a Favia too. If you observed the calyces walls the are in fact separated.
Herewith is an excerpt from http://www.bishopmuseum.org/research/pbs/O...CorBkCh3htm.htm for your necessary refference.
Favia:
Like all members of this genus, the calyces of this species are slightly separated from each other, instead of sharing a common wall as in the closely related and similar genus Favites, and the calycal shape is very irregular. This species most typifies this Favia structure. The calyces are highly variable in shape and may range from 5 mm to over 1 cm on a single coral. Calyx rims are raised slightly above the coral surface and septa are coarse, irregular and widely spaced.
Favites:
Adjacent calyces share a common wall in this species, which clearly distinguishes this species from Favia species, which it may otherwise superficially resemble. Calyces range from 10 to 15 mm in diameter, are somewhat irregular in outline and their rims show a tooth-like appearance that is caused by the incomplete development of one cycle of septa. The growth form is primarily encrusting, but small colonies may have a distinctly hemispherical shape.
Cheers,