Ibn al-Qayyim (may Allah have mercy on him) said:
Saying: Subhan Allah wa bi hamdih, ‘adada khalqihi, wa rida nafsihi, wazinata ‘arshihi, wa midaada kalimatihi (Glory and praise be to Allah, as much as the number of His creation, as much as pleases Him, as much as the weight of His Throne and as much as the ink of His words) is many times better than merely saying Subhan Allah (Glory be to Allah). What the one who says “Subhan Allah wa bi hamdih, ‘adada khalqihi…” achieves of knowing Allah, exalting Him and glorifying Him, when his dhikr is connected to the huge numbers mentioned, is far greater than what is achieved by the one who merely says Subhan Allah. This is called multiplied dhikr and it is greater glorification and praise than regular dhikr, hence it is better than it.
This is manifested when we understand what this dhikr means:
When the worshipper says Subhan Allah wa bi hamdihi, ‘adada khalqihi, it is like a statement and explanation of what the Lord deserves of glorification the number of every created being, what has been and what will be, for eternity. It includes an affirmation that Allah is above all things, and glorifying and praising Him this huge number cannot be comprehended by anyone who counts; the end of it can never be reached. It includes the person’s aspiration to do such endless tasbeeh (glorification of Allah). What the person says is not intended to limit the glorification to that number or level; rather he is saying that what Allah deserves of glorification is glorification which reaches that number even if it has no limit, because the creation of Allah will always be ongoing and will never be limited by a number or figure.
What is meant is that this tasbeeh has reached a level of perfection and majesty that indicates that it should be better than others and if something else were weighed against it, it would outweigh it. This is what some of these words refer to of the perfect qualities of Allah and praising Him by declaring Him to be above all things, in addition to praising Allah which implies the following:
i. Affirmation of His attributes of perfection
ii. Loving Him and being pleased with Him.
iii. If one adds to these praises, glorification and exaltation in the most perfect and sublime manner, the highest number of times, and the worshipper focuses on this glorification and contemplates its meaning, then this dhikr will have great virtue and advantages that are not shared by others. And Allah is the Source of strength.
Al-Manar al-Muneef, 34-38
And Allah knows best.
Ref: A Superior dhikr