Testing Mobile Devices Question

I’m due for a free upgrade in the next two months with my phone contract. Even though they’re massive overkill for my personal needs and uses, I’ll be able to upgrade to the iPhone 11 pro and Galaxy s10+ and pay less for them than what I’m currently paying for the iPhone XR and Galaxy s9+. My question is: since both are higher end flagship phones from two of the most popular brands in the consumer market, would testing Joplin on them be valuable to this project?