The better of them is the one who does more naafil actions

Regularly performing Sunnah actions is one of the causes of
Allaah loving a person, as it says in the hadeeth narrated by al-Bukhaari
(6502) from Abu Hurayrah who said: The Messenger of Allaah (peace and
blessings of Allaah be upon him) said: “Allaah says: ‘Whosoever shows enmity
to someone devoted to Me, I shall be at war with him. My servant draws not
near to Me with anything more loved by Me than the religious duties I have
enjoined upon him, and My servant continues to draw near to Me with
supererogatory works so that I shall love him. When I love him I am his
hearing with which he hears, his seeing with which he sees, his hand with
which he strikes and his foot with which he walks. Were he to ask
[something] of Me, I would surely give it to him, and were he to ask Me for
refuge, I would surely grant him it.” 

This hadeeth also indicates that Allaah helps and supports
the one who does a lot of naafil actions and protects his physical
faculties: his hearing, sight, hand and foot. 

Al-Khattaabi (may Allaah have mercy on him) said: 

What is meant is that Allaah helps and guides His slave in
the actions that these faculties do… He guides his physical faculties and
protects him against falling into that which Allaah dislikes, such as
listening to idle talk that he may hear, or looking at that which Allaah has
forbidden, or striking that which it is not permissible for his hand to
strike, or walking towards falsehood with his feet. 

Someone else said: His limbs do not move except with the help
of Allaah and for the sake of Allaah, and they all strive for the sake of
the truth. Fath al-Baari, 11/352. 

No doubt the one who is like this, all his deeds are light
(noor) and are guided by Allaah, and that increases the more naafil deeds he
does.  

But we cannot be certain that a particular person’s actions
have more light and guidance than another’s just because he does a lot of
naafil actions, because we cannot say whether Allaah has accepted these
naafil deeds. This is a matter of the unseen which no one knows except
Allaah. But it seems that if a person is given the choice between two
actions and he chooses that which is more liked by Allaah and closer to the
Sunnah, there is the hope that he will be guided and helped by Allaah. 

And Allaah knows best.