Is the God of the Bible more merciful than God in the Quran?

One argument put forth against the Quran is that in the Quran people's fate in the Hereafter is solely dependent on their works and deeds, unlike Christianity where it's God's mercy that earns a person Paradise.

To get straight to the point, whoever put forth this argument has poor understanding, not only of the Quran, but also of his own Bible!
To say that one Book (Quran) speaks of people’s deeds as the sole decider, while the other book (Bible) makes God's mercy the decider is totally false.
The truth is that both Books confirm the importance of both, our own deeds, as well as God's mercy.

Since this argument claims that the Quran is about deeds while the Bible is about God's mercy, it is thus necessary to look at verses from each book which confirm the opposite of this claim.
First, we look at verses from the Bible which confirm that deeds play a major role in deciding the fate of the human being in the Hereafter.
Following that, we also look at Quranic verses to show that God's mercy is the key decider in deciding the fate of the human being in the Hereafter. It can also be shown from the Quran that God’s mercy allows people who committed the worst of sins to be still forgiven and end up in Paradise.

FIRST: Verses from the Bible which confirm the importance of our deeds:

Both the Old and New Testaments emphasise that a man’s work and deeds do matter and they are not just a passive product. Numerous verses confirm that the final judgment on the last day will be based on each man’s deeds!

Old Testament:

“Also to you O Lord, belong mercy; for you render
to each one according to his work.”
(Psalms 62:12)

“And will he not render to each man according to his deeds?” (Proverbs 24:12)

New Testament:

Now we can concentrate on the New Testament since the claim above always comes from Christians. In the New Testament we have a great number of verses to choose from:

“Each one will receive his own reward according to his own work.”
(1 Corinthians 3:8)

“For we must all have our lives laid open before the judgment of Christ, where each will be recompensed for his deeds in the body, according to what he has done, whether good or bad.”
(2 Corinthians 5:10)
“If you say “Our Father” to the One who judges every man impartially on the record of his deeds, you must stand in awe of Him while you live out your life on earth.” (1 Peter 1:17)
“Then another book was opened, the roll of life. From what was written, the dead were judged according to their deeds.” (Revelations 20:12)
All the above passages from the New Testament (and more could be added to the list) tell us that, according to the New Testament, the final judgment will be on the basis of deeds, to see if each man’s life was lived in faithfulness to do all that was commanded of him.
This is the verdict of the New Testament and it needs no elaboration. Therefore, to say that the Bible speaks of God’s mercy as the only decider to a man’s fate is contrary to all the Biblical evidence presented.
SECOND: Verses from the Quran that confirm the importance of God's mercy:

Say, "O My servants who transgressed exceedingly against themselves, do not despair of God's mercy, for God forgives all sins. He is the Forgiver, the Merciful." 39:53

God promises you forgiveness from Him and favour. 2:268

Your Lord has decreed mercy upon Himself. 6:54

Your Lord has
forgiveness for the people despite their transgressions. 13:6

It is thus very significant that God is called the Raheem (Merciful) 95 times in the Quran. In addition, God is also called Ghafoor (Forgiver) 92 times in the Quran.
The above Quranic verses confirm the importance of God’s mercy and how it can over-ride people’s sins.
The above evidence, from the Quran as well as the Bible, paints a totally different picture from the claim made above.

For more Quranic details about God’s infinite mercy please check the following page:
A glimpse into God’s mercy