Honestly, this is a huge amount and therefore humans cannot be compared to bananas as it just means we have a lot of the same proteins to produce cells and express genes. Imagine this, if we compare the binary code of a software program like Word, and something like Grand Theft Auto, there is likewise by sheer stochastic variance a 50% overlap between the two programs. Does that mean that Microsoft Word and Grand Theft Auto are the same software? The answer should be quite clear. Likewise, a human cannot be compared to a banana.
Honestly, I don't like the word animal, it's too general. According to biology, an animal is merely a multicellular motile organism. Anything from the largest of elephants to the simplest of jellyfish is an animal. Humans are by definition an animal due to the way we develop, there's no way around that.
And thus we arrive at such a broad category of species with pretty much nothing in common that the value of the word animal means nothing.
What you're probably more interested in this question: "Should humans treat other animals in the same way humans treat humans". Because if we acknowledge ourselves to be animals then we're putting ourselves on the same level as those we perceive as lesser beings, and we have to afford animals some basic rights that we may not be interested in giving them. Now this is purely a philosophical question and relates in no way to biology which most people have been arguing. So I propose we throw any biological discussion out of this thread due to it being an undeniable fact that humans are biologically an animal.
And thus I guess I'll approach this from a utilitarian point of view and say that we shouldn't afford animals the same rights as humans, as that would impair the development of human society. We should only afford animals rights in the extent that said rights benefit humanity (ie. by increasing biological diversity, or by making said animals better at helping humans). Therefore animals should not be treated the same as humans.
This may be a slightly controversial opinion, but I'd love to hear what other's have to say about this.