Previous foam trays had space for 36 infantry models. Based on the pictures, I estimate these trays to fit ~46 models. That said, it does look like you only get two per Skirmish case, not the three you got in the equivalent old cases, so they hold about 16 fewer models. Of course, the different tray might be able to hold more, if you don't mind squashing th models together somewhat, so it's hard to say without seeing them side by side in real life.
All of which is irrelevant to me, since I already have three small cases and one large and don't need more. Still, it is nice to see the prices haven't gone up.