Let's try to set this straight. A lot of mixed up facts or misinterpreted terminology.
All Surfboards are a sandwich construction. Laminate-foam - laminate = sandwich.
Laminates can be made using many kinds of fibers. Glass, carbon, kevlar, hemp, jute, etc. They can be combined into multi fiber weaves or used in layers.
Laminates also have a matrix. Epoxy or polyester. Epoxy is most dominant. Some boards have thermoplastic matrix ( LF galaxy).
Now here's the big difference. Some boards have a simple laminate on the foam core. They can be plenty strong if sufficient laminate is used and sufficiently high density foam is used. It all depends upon the weight and type of fabric in the laminate and foam density.
Some boards have what is inaccurately, but used in marketing, called sandwich construction.
That means the structure looks like this from deck : laminate- thin high density foam ( generally 80kg/m2 3mm thick) - laminate - core foam,
- laminate- thin high density foam- laminate. This is way stronger than simple laminate on foam. Laminates can be thinner. And if done correctly its lighter and stronger than simple laminate. If you want a board that weighs 2,5 kg and is strong, you have to pay for this construction which is more expensive.
Many of us use hydrofoil boards with such low volume, that using " sandwich " construction is not worth it. Theres not much foam in there. It's easier to just use a higher density foam and simple laminate. Many manufacturers are doing this.
Now the orb looks like a simple surfboard construction. PU foam with glass laminate, perhaps some carbon unidirectional in the center. That construction is totally ok. But it has to have extra lamination to stand up to abuse. If it weighs 3kg then it likely does. ( or the makers are totally lost- not likely). That said, a board made this way has to be treated like a sensitive musical instrument. Its going to get dinged if you bang your bar on it, let it rest against your harness hook with 4 kg hydrofoil hanging out there, it's going to ding or get laminate damage.
Delamination is likely manufacturing error and the board should be returned on warranty.
Overall, kiteboarders coming from TT don't understand or realize that a surfboard is a super sensitive object. Not all kitesurfboards, or hydrofoil boards, but all will not take abuse like a TT.