But the manifestation of the Spirit is given to every man to profit withal.
But. Though all the gifts flow from the one God, Lord, and Spirit, the "manifestation" by which the Spirit, though hidden in Himself, acts, varies in each.
To every man - to each of the church members severally. To profit withal - with a view to the profit of the whole body.
Three genre of gifts are distinguished, with their respective species; alloo (G243) marks the species, heteroo (G2087) marks the genre (cf. Greek, 1 Corinthians 15:39-41).