I think it’s also easier to have many cars on a Euro-Fighter; for example, the aforementioned example of Saw has dual loading, so 2 cars of 8 are dispatched at once, and it also has a separate offload area, so there can in theory be 24-32 riders in the station area at once. Even some of the lower capacity Euro-Fighters tend to have one car unloading while the other is loading, making for 16 riders in the station area. Combine that with the fact that these coasters operate similarly to a wild mouse or spinning coaster in that they have many block sections and quite fast dispatches, making for quite a few cars at once, and they actually don’t have overly low capacity; most are in the very upper end of 3 digit numbers of riders per hour, and quite a few even get in excess of 1,000 riders per hour.
The Raptor Track, on the other hand, has a much longer train, more akin to that of a standard coaster, and it is also more like a standard coaster in how it operates. Due to this, there can only be 8 riders in the station area at once, so the dispatch occurs at a regular coaster sort of interval, therefore meaning that the throughput doesn’t get much above 500 riders per hour. By my calculations, even if a train is dispatched every 40 seconds (which is very, very fast for a standard length coaster train), the ride can only attain a maximum of 720 riders per hour (I think? A train every 40 seconds would lead to roughly 90 trains per hour, so 90*8=720).