Both have mass, have carbon based, both contain DNA/RNA, both are suprinsingly over 50% water, both are food, and both can be tasty when served right.
From other aspects they are not.
In many cases, one or the other would do. In other cases, you want something more special (e.g. more protein, or less fat).
The person I replied to made a definite claim (that we are "very obviously not ...") for which no evidence has been presented and which I posit humanity is currently unable to definitively answer in one direction or the other.