Answer

Yes, in most contexts manah and manas refer to the same thing: the mind.

Explanation

• Manas is the basic Sanskrit word.
• Manah is usually a grammatical form of that same word, often written as manaḥ.
• So the difference is mostly in word form, not in meaning.

In simple terms:

• manas = mind
• manah / manaḥ = mind, in a different grammatical usage

Spiritual Understanding

In Jain Dharma, the mind is very important because:

• it influences thoughts,
• thoughts influence speech and actions,
• and purified mind leads to better karma and spiritual progress.

So whether you say manas or manah, the focus is on the inner faculty of thought and intention.

Takeaway

Yes, they are generally the same in meaning. The difference is mainly grammatical, not philosophical.