I feel like in order to address a memory usage issue, we need to be comparing the same application implemented with Flutter and the thing you want to compare it to, with the details of the memory usage statistics (how much is resident, etc.).

A simple measurement and "I think it's too big" isn't going to get us to any actionable issues, even if we agree with you. Telling us that some subsystem (fonts, i18n, images, etc.) uses more memory than expected is closer to something actionable, but we'd still need to know what the goal was and what it was begin compared to.