The connections are the same. The cameras are not, and can only be used on the intended drone. To be precise, yeah, the "camera" itself will pretty much work, but the gimbal that controls the camera position will not. Which leaves the camera pretty much useless.
As an original purchaser of the H, the main reason for buying it was the offer of updates and multiple camera options.. That was Yuneec's marketing pitch.
In reality we got one so so 4k camera, then after a while a $2000 loRes infraRed with 1080 camera..... then absolutely nothing else.
Every Yuneec product is locked to itself, just like DJI. Even the batteries aren't compatible between models... just like DJI.