Hi bhavin05,
Both documents are similar in nature.
A Deed of Trust is a legal document which sets out the terms of the trust.
A Declaration of Trust also outlines the terms of the Trust, however, it contains the additional section of outlining specific beneficial interest split of a property.
A Deed of Trust also includes additional legal binding clauses.
Guidance may be found at TSEM9520 here:
TSEM9520 - Ownership and income tax: express trusts - written declaration
Thank you.