Slow down. I did not say, "I 'believe that all men have sinned (thanks to Adam) but that redemtion (thanks to Christ) is only for some.'" I will try to do most of my thinking for myself
Actually, I DO agree that redemption is only for SOME and that MANY will not be redeemed (isn't that obvious??? Rev. 20:15, Matt. 25:41, Mark 4:14-20).
As for whether or not Adam's work was superior to Christ's:
"But the free gift is not like the transgression. For if by the transgression of the one the many died, much more did the grace of God and the gift by the grace of the one Man, Jesus Christ, abound to the many.The gift is not like that which came through the one who sinned; for on the one hand the judgment arose from one transgression resulting in condemnation, but on the other hand the free gift arose from many transgressions resulting in justification. For if by the transgression of the one, death reigned through the one, much more those who receive the abundance of grace and of the gift of righteousness will reign in life through the One, Jesus Christ. So then as through one transgression there resulted condemnation to all men, even so through one act of righteousness there resulted justification of life to all men. For as through the one man's disobedience the many were made sinners, even so through the obedience of the One the many will be made righteous."
So, the "free gift," or "Christ's work" (as you call it), is different from the sin of Adam (transgression and judgement). They are not the same because:
1. Adam's sin brought death (condemnation), but the gift brought grace (justification).
2. The judgement came from one transgression, but the gift came from many transgressions.
3. Death reigned through Adam, but we* reign through Jesus.
4. Adam's disobedience led to many sinners, but Jesus' obedience led to many righteous people.
Do you agree or disagree with 1-4?
/p
* or, "those who receive the abundance of grace and of the gift of righteousness"