TopDesign offers Free Trial, but Yacss does not.
The starting price of TopDesign begins at $20/month, while pricing details for Yacss are unavailable.
TopDesign offers several advantages, including Prompt-based design generation, Unlimited design creation, Frontend focus with backend option, Two pricing plans, No design limits post-subscription and many more functionalities.
The cons of TopDesign may include a No backend in Unlimited Plan, Backend integration extra cost, No real-time support, No refund policy. and Lacks feature details