Different Streaming Devices Question

My quick answer is to NOT get the basic Roku Express. It has too little channel memory and constantly needs to download/install. Consider the Express 4K+ as the base model. You don't need a 4K TV for it. It also includes the voice remote. For most streaming, it's more than enough and quite fast. To be honest, it seems nearly as fast as my Ultra.

I also have a Fire TV 4K Max stick as a backup. It's noticeably slower. The home screen is a confusing mess. If you don't touch the remote for a few seconds, you get CONSTANT little popups telling you to use voice commands for this or that. It also quickly ran out of memory trying to load my apps. I had to get an OTG cable and USB drive, and even that doesn't help much as most apps won't install to USB. It comes with 8GB, but only about 5GB is available for storage. There are also many apps you cannot uninstall, although you can hide them from the apps list.

I recently bought that Walmart Onn 4K Google TV streaming box (US$19.88). It was mainly for playing around with, but I may replace the Fire TV with it. It's about the same speed. The home screen is a bit cleaner, and no prompts to use voice. Google has optimized Google TV apps for file size, so everything fits, and I still have room. It has the same 8GB, with 5GB available. I think about the only uninstallable app is YouTube.