Hi,
I would recommend you to go through the http://support.smartbear.com/testcomplete/docs/app-testing/web/mobile/real-devices.html help topic to get more information about SmartBear browser.
Next step is to execute your tests (properly created, of course) using SmartBear browser and Virtual Browsers (http://support.smartbear.com/testcomplete/docs/working-with/managing-projects/properties/open-apps/web-testing/virtual-browsers.html) and compare their results.
As a final step, you may compare results of your automated tests with the results of the same actions done manually using native mobile browser to get an understanding if there are any significant behavior differences *for your given tested web application* when running it in SmartBear / Virtual / native browser.
