3dcart has no transaction fees, which is always a big plus. It also offers both a mobile front-end and a mobile back-end. What’s interesting is that it also has a full suite of web store related services, like SEO or Facebook marketing. That’s not common for a shopping cart provider but could come in handy. I would advise you to look at some other pages on the site as well, since there are some excellent resources there (like a shopping search engine comparison).
For my money though, comparing SaaS and deployed platforms is a bit too big of an ask. Comparing Apples with Apples is a good ambition but by their nature you have two very different types of fruit there. Magento site performance, for example, is almost entirely dependent on how well set up the store is. A good Magento developer can make it sing – but it takes time and expertise…. As a SasS solution the variance between Shopify sites should be much smaller.