LM Studio vs Bionic

I am confused between LM Studio and Bionic.

I have LM Studio for a long time though not used frequently.

Recently I am trying to learn the agentic stuff. Watched a few videos but they were all using Bionic. The strange thing is the interface looks different than the one I just installed today. (Mine seems to be missing features, no developer mode. I am on MacOS)

On the other hand, I seem to be able to find those missing settings in LM Studio.

So what is the difference between the two? Is there anything Bionic can do but LM Studio doesn't?