It might be a ripoff, but my question to you is should that be illegal? The entirety of humanity is monkey see monkey do iteration on our previous ideas. It’s a dubious thing to litigate.
To add to that, no fan of either is going to confuse one for the other, so where’s the issue?
This is very fair, but then again, my parents would get confused over the difference between an Xbox and a PlayStation, so take that for what you will.