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If you select from the fonts available within the sitebuilder they should show across all browsers, consistently.
If you are using a non-web custom font that you have installed on your PC but may not be installed on other devices, then you will see a difference on the other devices.
You can install most fonts, if not available within the sitebuilder library, by a special process. Google Fonts is a good repository of many uncommon fonts and allows fairly easy implementation for your website. There are a number of other web-font providers that can be found on a web-search.
I don't know specifically how you have set up your font selection so that is why I have outlined a general explanation.