Minecraft wiki entry for Parity_issue_list, associated text: Sunflowers: the back and front are one element in Java Edition but rendered as two completely separate planes in Bedrock Edition, both of which can be seen from the front. Java Edition is also affected by MC-122701.
Cross models: the pixels are more square shaped on Bedrock Edition, and the back faces are more realistically mirrored (although this results in cases of ugly unrealistic mirror symmetry).
Other plane models