Answer

In the traditional Jain view, Samayasara is generally considered older than Tattvartha Sutra. And if you mean which has more focus on gyan-kaand / आत्म-ज्ञान, then Samayasara is deeper and more concentrated on that विषय.

Explanation

• Samayasara is mainly about:

- the pure soul - self-realization - right understanding of the Jeeva - removing false identification with body and karma

• Tattvartha Sutra is more like a complete philosophical summary of Jain Dharma:

- it explains the tattvas - karma - samvara - nirjara - moksha - and the overall Jain path in a very systematic way

So:

• For deep आत्म-ज्ञान and gyan-dhara → Samayasara
• For broad, structured Jain philosophy → Tattvartha Sutra

Spiritual Understanding

Samayasara goes inward and teaches the soul in a very profound way. Tattvartha Sutra gives the complete map of Jain philosophy in short, precise sutras.

So if someone wants:

• depth → Samayasara
• scope and structure → Tattvartha Sutra

Takeaway

If your question is about age, the usual Jain understanding is Samayasara first. If your question is about gyan-kaand, then Samayasara is more ज्ञान-centered, while Tattvartha Sutra is more comprehensive.