1 Corinthians 9...I would say the reward is the same as spoken in these verses and not salvation but a different crown...
1 Corinthians 3
11 For other foundation can no man lay than that is laid, which is Jesus Christ.
12 Now if any man build upon this foundation gold, silver, precious stones, wood, hay, stubble;
13 Every man's work shall be made manifest: for the day shall declare it, because it shall be revealed by fire; and the fire shall try every man's work of what sort it is.
14 If any man's work abide which he hath built thereupon, he shall receive a reward.
15 If any man's work shall be burned, he shall suffer loss: but he himself shall be saved; yet so as by fire.
1 Corinthians 3
11 For other foundation can no man lay than that is laid, which is Jesus Christ.
12 Now if any man build upon this foundation gold, silver, precious stones, wood, hay, stubble;
13 Every man's work shall be made manifest: for the day shall declare it, because it shall be revealed by fire; and the fire shall try every man's work of what sort it is.
14 If any man's work abide which he hath built thereupon, he shall receive a reward.
15 If any man's work shall be burned, he shall suffer loss: but he himself shall be saved; yet so as by fire.
b. metaphorically, α. the eternal blessedness which will be given as a prize to the genuine servants of God and Christ: ὁ τῆς δικαιοσύνης στέφανος, the crown (wreath) which is the reward of righteousness, 2 Timothy 4:8; with an epexegetical genitive in the phrases λαμβάνεσθαι, διδόναι τόν στέφανον τῆς ζωῆς, equivalent to τήν ζωήν ὡς τόν στέφανον, James 1:12; Revelation 2:10; κομίζεσθαι τόν τῆς δόξης στέφανον, 1 Peter 5:4; λαβεῖν τόν στέφανον τίνος, to cause one to fail of the promised and hoped for prize, Revelation 3:11. β. that which is an ornament and honor to one: so of persons, Philippians 4:1; στέφανος καυχήσεως (see καύχησις, 1 Thessalonians 2:19 (Proverbs 12:4; Proverbs 16:31; Proverbs 17:6, etc.).