Ceramic usually has a red/brown body, porcelain is either white, tinted to match the glaze [though considerably lighter in tone], or color body/color through. Porcelain is stronger, but for 90% of residential use, ceramic is plenty strong-- consider that glazed tile is the last surviving remnant of many ancient civilizations, and that you can buy ceramics from the time of the Roman empire on Ebay for a few bucks. A couple cautions: if your kids are waaay out of control, the porcelain could be better in that it resists cracks. But if it's properly set and supported, they'ed haved to drop a shot put or the like to crack regular ceramic. I like porcelain for kitchens in case someone drops a very heavy skillet or similar, though. And in the bath, the color body porcelains tend to offer better traction. Look for the CoF numbers on the tile you like [if you can't find it, ask the salesman to track it down]. CoF is Coficient of Friction, and measures grippiness. Higher is better. Try sliding your foot accross a sample, both wet and dry, and never use a tile in a wet location that is at all slippery-- the EMTs won't care about your lovely tile while sliding your naked tush on a gurney because you've taken a tumble.

Quarry tile used to be the thing to use in commercial kitchens. Although on the surface, it's somewhat absorbtive, water doesn't really penetrate all that far into the tile, making it rather easy to keep clean. Then along came porcelain. That's now the tile of choice for kitchens for a couple of reasons. First, it's a much more versatile tile. More available colors, textures, and so on. Secondly, it's not absorbtive at all, making it even easier to keep clean. Back a couple of years ago, I had a partner, and we went all over New England doing the tile work for Wendys and Tim Hortons, and every one of them had porcelain tile on their kitchen floors. With Wendys, it was an unglazed 8x8 Crossville tile with what they call "Crossdot" texture (hundreds of small raised dimples on the face of the tile that make it virtually impossible to slip on), and at Tim Hortons, it was a glazed Italian porcelain 12x12. Use the porcelain. You'll be happier with it, both from an aesthetic point of view, as well as a practical one.

There is some helpful information about Sintered Stone vs Porcelain here: https://www.tenax4you.com/compact-surfaces-sintered-stone-porcelain-compared-s/2092.htm That website has several articles making comparisons between different materials. Might be a page to bookmark and share with others since the properties of natural stone, engineered stone, and other man made materials can get pretty confusing sometimes. Hope the information helps future readers.

I don't have any experience with that specific floor, but I have sold dozens of Happy Floors tile floors and have never had an issue or claim with them. My in-laws put it in their 3 season porch. They love it and have not had any issues with it. About the only issues there are with porcelain floors are if the tiles arrive broken.