I believe the audiences are different - the people who are using Resizer aren't necessarily comfortable in Dev Tools. Also, since the resizing UI is drawn in t

I believe the audiences are different - the people who are using Resizer aren't necessarily comfortable in Dev Tools. Also, since the resizing UI is drawn in the same window as the preview, it's usable on a tablet. If you're just doing a quick design review and are away from your laptop, this could be a good solution.