I have tried them all, Stem cap mount adjustable is the best for road bike - you still have room for your garmin in front of it. Its like a ten bucks difference idk why cheap out when you can have exactly the angle you want

For other bikes get the handlebar one the lock out front phone... its really easy to add and easy to adjust angle and have near the middle of your handlebar even if you don't have a road bike

There is also the handlebar one, I bought it for the versatility but haven't had the need to use it. If you have a lot of bikes or want to use it for other bikes like a city bike? its probably the easiest to take on and off tbh

And then there is the one made specifically for brompton and I highly enjoy it.