Redis does not do page caching, it's the only one which not make your page static. If you have issue with Redis, don't forget you should add settings to your wp-config.php according to the object-cache plugin. You can also use redis as a docker container.
And don't use webpagetest.org to compare the speed between two caching system, they already not give the same result with the same cache...
you can try with https://tools.keycdn.com/speed But the best will be to use a tool like siege, so you will be sure of the results.
