Who is happier than the Christian? Who faces adversity with as much strength as the Christian? Who produces as much goodness according to the God-given good fruit of faith as the Christian? Who wishes bounty for all the world and who wishes every man to know this very same joy and comfort and assurance?
The Buddhist.
The Buddhist doesn't care about the rest of humanity. He cares about getting himself into the zone of nothingness he thinks awaits him.
Only the Christian believes he is instructed to "be fruitful and multiply" and to actually spread the good news of the Gospel to all men.
"So shall my word be that goeth forth out of my mouth: it shall not return unto me void, but it shall accomplish that which I please, and it shall prosper in the thing whereto I sent it." -- Isaiah 55:11
The Buddhist can's say that. He doesn't even want to.
The Buddhist believes the world is an uncomfortable place from which he seeks to escape. The Buddhist disdains the body and the material world.
The Christian knows that "for God so loved the world, that He gave His only begotten Son..." (John 3:16)
The body and the world are what we are given by God to make something of. If we have faith in Jesus Christ, what we will make of our body and the world is something which will glorify God.
And we will enjoy Him forever.