Premium themes are efficient when their content model and interaction patterns already fit the business. They reduce initial engineering and can offer mature merchant controls.
Custom themes become valuable when differentiated storytelling, complex merchandising, unusual product logic or long-term performance needs make repeated overrides expensive.
The right comparison includes future campaign work, app dependency, maintenance and team capability—not only the first build invoice.
Choose one high-value journey, document the current evidence and give the next change an owner, a success signal and a review date.