Assertion: Historians believe that Ashoka was more powerful and industrious, as also more humble than later rulers who adopted grandiose titles.
Reason: The message on Asokan inscriptions was the same as that of most other rulers.

The Assertion is correct but the Reason is incorrect.

Many of these historians found the message on Asokan inscriptions very different from that of most other rulers, suggesting that Asoka was more powerful and industrious, as also more humble than later rulers who adopted grandiose titles