Broadly speaking, I would not make this decision based on the technical merits of either option. Instead, choose based on your high level goals for this project

Broadly speaking, I would not make this decision based on the technical merits of either option. Instead, choose based on your high level goals for this project. Is the point to build and support this project for the medium to long term? Choose the one with which you’re more familiar, or for which there is more available help and resources. As a sub-consideration, do you expect others to work on this project with you? Choose the one with which contributors are more likely to be familiar. Is the point to learn a new UI framework? Choose the one in which you’re most interested. Is the point to burnish your résumé? Choose the one that is more in demand by the opportunities you’re seeking. That’s assuming that both technologies can meet your requirements (e.g. if you might want to use this on resource-constrained devices, choose Qt; if you want a web version, choose Electron). But all else being equal, you need to figure out your goals before you can make this decision.