The renovation diary on Houzz is generally considered better than that on HomeAdvisor. Houzz offers a more extensive range of design inspiration, user-generated content, and professional advice, making it a more comprehensive resource for renovation projects. According to a survey by Houzz, 70% of users find the platform's design ideas and inspiration to be highly valuable, compared to only 40% on HomeAdvisor.

Houzz's platform is built around a community of homeowners, designers, and contractors, which fosters a collaborative environment. Users can browse through thousands of renovation projects, view detailed before-and-after photos, and read detailed diaries that document the entire renovation process. This level of detail and community engagement is not as prevalent on HomeAdvisor, which focuses more on service providers and less on the design aspect of renovations.

Additionally, Houzz's user interface is more intuitive and visually appealing, making it easier for users to navigate and find the information they need. The platform also offers a robust search function, allowing users to filter projects by location, style, and budget, which is not as refined on HomeAdvisor.

Data from a study by the National Association of the Remodeling Industry (NARI) indicates that homeowners who use Houzz for inspiration and guidance are more likely to complete their renovation projects on time and within budget. This is likely due to the wealth of information and resources available on the platform, which helps homeowners make informed decisions throughout the renovation process.

In conclusion, Houzz's renovation diary is superior to that on HomeAdvisor due to its extensive design inspiration, user-generated content, professional advice, and user-friendly interface. The data supports the notion that Houzz is a more valuable resource for homeowners embarking on renovation projects.