There are so many factors to consider when setting up your online store. One main one that keeps coming back up however is the ability to rank the store in search engines. After all what is the point in having an ecommerce shopfront if noone can find it.
We found this article well researched and thorough, it ranks Magento, Shopify and WooCommerce (a wordpress plugin) as the top 3, and we have to agree.
If you are interested in more details on this of course talk to us, but definitely worth a read if you are having trouble making sense of things or want an opinion outside that of your current web developer's.