The point was GC cost in general, not which Java/JVM implementation you choose. Try comparing two Androids with the same chipset at 4GB vs 8GB RAM.

Anyhow, that was just an anecdotal unscientific experiment to give you some idea--obviously they are two different codebases. The literature is there to quantify the matter as I noted.

Android for a very long time lacked a quality JIT, AOT and GC implementation, and then each device is a snowflake of whatever changes each OEM has done to the device.

Unless one knows exactly what ART version is installed on the device, what build options from AOSP were used on the firmware image, and what is the mainline version deployed via PlayStore (if on Android 12 or later), there are zero conclusions that one can take out of it.

Also iOS applications tend to just die, when there is no more memory to make use of, due to lack of paging and memory fragmentation.