In Jain dharma, siddha souls are all equal in their pure qualities, but they are not one and the same soul.

The key point is:

• Ananta in the liberated state means endless, पूर्ण, limitless qualities like infinite knowledge, infinite perception, infinite bliss, and infinite energy.
• It does not mean that all siddhas become one single entity.
• Each siddha remains a distinct dravya (substance), a separate soul.

So how are they differentiated?

• By their individuality as souls: each jīva is eternally a separate reality.
• Not by defects, body, gender, name, or form: all these are gone after liberation.
• Not by difference in pure qualities: all siddhas have the same perfect qualities.
• Therefore, siddhas are different in existence, but equal in perfection.

A simple way to understand it:

• Many lamps can all give the same light.
• Their light may be the same in nature, but each lamp is still a separate lamp.

Similarly, all siddhas are:

• separate souls,
• fully pure,
• completely समान in attributes,
• yet each one remains individually distinct.

So in Jain philosophy, the answer is: they are not differentiated by qualities, but by their eternal individual existence as distinct souls.