Ceramic inlays vs. onlays: What's the difference?

I could use some advice. I’ve got a pretty significant cavity on one of my lower molars. It looks like a ceramic inlay or onlay is my best bet, but I’m stuck on a few things:

Which type of ceramic actually holds up better?
Should I go with a glass-ceramic like IPS e.max, or stick with something like Zircon?

Does using Zircon mean less tooth structure has to be ground away?

What’s the superior way to get this made and why?
Having it pressed at a lab
Lab-made CAD/CAM
In-office CAD/CAM

Since the decay is getting close to the pulp, would a composite filling actually be the smarter move?

If I do end up going the composite route, which brand do you guys think is top-tier?

Obviously, biocompatibility and longevity are my main concerns. From what I've gathered, a ceramic inlay/onlay isn't necessarily more durable than composite, and there seems to be a lack of reliable, long-term research regarding biocompatibility for either.
Basically, ceramics are likely biocompatible, whereas composites probably aren't. Zircon is relatively new to the scene, but they market it as being the most natural option. Does anyone here have more insight on this?
Thanks

Beyond the materials and the manufacturing process, you really need to focus on the expertise of your dentist and lab technician—that’s what actually dictates the outcome. The choice of material isn't determined by how close it sits to the pulp. If everything is done correctly, ceramic is significantly more durable and long-lasting than composite. Personally, I’d recommend IPS e.max.

Thanks