If you want it to look exactly the same, don’t make it responsive, i.e. so it wouldn’t reformat automatically based on the user’s device size. A more user friendly option would though to make it responsive, and just make sure it’s the same design, same content. This would be done by just building 1 website, and making it responsive, so you also just update 1 website too. You can do this easily with UltimateWB. The built-in styles manager has a responsive app that you can turn on and configure. No experience necessary, and you can design your own website style with it.
Got a techy/website question? Whether it’s about UltimateWB or another website builder, web hosting, or other aspects of websites, just send in your question in the “Ask David!” form. We will email you when the answer is posted on the UltimateWB “Ask David!” section.