[tentcamper]

Your picture of what you call drop leg jacks, are stabilizers. Not meant to jack up anything. Flip down jacks, you flip, and slid them and the last step you can use the jack handle, which most people don't know how to jack them up or have the jack handle. If you have a handle it's a strange jacking method to apply tension. Scissor jacks are truly jacks, you can apply much more force on them, they are made for lifting.

I have used both and like the scissor jacks much more for taking out the bounce of a trailer.