A catalog website enables you to provide more options to your customers such as place an order, book or request a quote and provides you an opportunity to address any barriers that may drive a customer away.
An ecommerce website with online payment integration requires more work and resources to implement and maintain. Your customers will be parting with their money before they receive the goods or services and these requires that you put in place proper systems and structures to earn their trust. A catalog website requires less resources and building trust with customers is easier.
If you’re starting out, a catalog website may give you the fastest route to test and grow your business with minimal input in terms of time and resources. You still get to give your customers a good online shopping experience and without compromising your sales.