I'd love to ask how you find the different sponsors... I feel from the HK episodes you have more freedom to creatively express yourselves. The episodes are more organic, more humerous, more 'Flitetest'. Of course there's always some influence from an external 'Hand', but I've always felt Flitetest is something that fits HK well (sense of cheap, accessible, fun thrills), where as the HZ ones are more clinical, heavily edited and a little... corporate. There seems to be lots of stuff you have to hide to keep the HZ sheen on their episode, rather than the Flitetest (and Stonekap productions) frivolity.
I have called a few potential sponsors like Hobby Lobby and HiTec, but Hobby King and Horizon both approached us first. It just took Horizon a lot longer to come on board.
I think most people would feel that your description of the differences between the two types of episodes are accurate.