I never felt a sanyasi in the Buddha just as I never felt a sanyasi in Sri Aurobindo leaving behind everything as he sailed to Pondicherry. They did what they did under the pressure of a tremendous aspiration moved with deep compassion for the world. They are hero warriors, Samurai who went away not because they couldn’t handle the world or afraid of its challenges but because they were so much occupied with their quest that they were ready to go and ready to leave anything for its sake. Tyaga of course and that too very naturally, unassumingly without ostentatious show or fuss. The ascetic on the other hand does it either out of fear of the world or else to showcase himself to the world as a great renunciate.
In fact as long as one is attached to the world and the mind values them, mere outer renunciation is hardly of help. And if one is no longer attached then outer renunciation means diminishing the means of outer manifestation.
Affectionately,
Alok Da