No pain no gain
It's all to do with the sensor chip size... the sensor size of the former is typically small, about 5mm x 4mm, whereas the APS-C size sensor (from a cheap Canon for example) is roughly 22mm x 17mm... so about 4x the size in each dimension. For the same scope, the larger sensor will give you the larger FOV.
Hence why it will depend on the subject... for planets you only need/want a small FOV, but high frame rate...this is what the ZWO/QHY are designed for. For DSOs, you'll not fit many in the FOV of one of these...maybe planetary nebulae.