One benchmark would be to track down a python/JS/etc based "hello world" demo container. Base one version on Intel and the other on ARM, and measure each versions container build-time and request latency after it is set-up.
If changing the base image is all that's needed and both Dockerfiles otherwise assume ubuntu, this should not take too long.
If changing the base image is all that's needed and both Dockerfiles otherwise assume ubuntu, this should not take too long.