In Jain tradition, Digambar is generally considered older as a sectarian form than Śvetāmbara.

A simple way to understand it:

• Original Jain Sangha is older than both.
• After later differences in practice and discipline, the two traditions became distinct.
• Digambar is usually regarded as the earlier continuing form.
• Śvetāmbara became a separate tradition later.

So, if you are asking which one is older between the two existing sects, the usual answer is:

Digambar is older.

If you want, I can also explain how the Digambar–Śvetāmbara split happened in a very simple Jain way.