If anyone is interested I will be performing some tests for comparison between the three boards.
I currently don't have a Uno R4, if anyone is willing to help there please step forward.
Also suggestions for code that you want speed tested will help too.
I have all three, send me the details of the proposed tests, and post any code you want run.
A graphics test that goes through patterns, shapes and text rendering would be great.
Use a screen that is parallel to use more of the pins, and make sure it is has a resolution of at least 320x240.
That presents a fairly good impression of which will be the overall fastest.
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