This is thanks to Verus, a case manufacturer who has recently uploaded several renderings of their upcoming cases for the Samsung Galaxy S6. The case designs itself are pretty interesting, but at the same time the design also gives us an idea of what we could expect. From what we can tell, it looks similar-ish to what Spigen had revealed either.
Based on this we can only assume that either Verus is relying on Spigen’s designs to render their own designs, or if they might be based on leaked specifications or insider information that revealed to them ahead of the launch as to what the phone might look like. The placement of the camera and its flash unit is similar to previous leaks, so they are consistent at the very least.
In any case they should be best taken with a grain of salt for now, but either way we are looking forward to seeing what Samsung could have in store for us. Fortunately the rumors claim that the handset manufacturer could be unveiling something at MWC, so we will have to look forward to that date for more Galaxy S6 information.