Commerce Server offers e-commerce solutions for B2C, B2B and B2X. Previously Microsoft Commerce Server.
Yahoo Merchant will help you create, manage and advertise your online store
Yahoo Small Business is leading in Top 100K Sites, Top 1M Sites and The Entire Web.
In terms of market share, Commerce Server is clearly lagging behind, losing to Yahoo Small Business in all segments.
Yahoo Small Business has better usage coverage in more websites categories. Including Home & Garden, Lifestyle, Computers Electronics & Technology, Vehicles and 20 other categories.
Commerce Server hasn't got a lead over Yahoo Small Business in any websites category.
Yahoo Small Business is leading in most countries, including United States, Canada, United Kingdom, India and 79 other countries.
Commerce Server is leading in New Zealand.