Lagendia Continent Exploration

[yewray]

At the end of the Lagendia Continent Exploration, we get to choose to open the Jackpot chest and the regular chest.
So far based on all my runs, 7 regular chest is better than 1 jackpot chest in terms of the number of points and lagendia boxes.
Which 1 is better, the Jackpot chest or the regular chest?
Can any1 share the contents of each chests?

[ImUrGA]

If you going for points: regular chest
If you going for item (eg: plate, jade hearts, jade fragment etc): jackpot chest

[yewray]

What are the chances of getting the jade hearts and plates based on your experience? because so far I got none of these
Are all the plates obtained have 3rd stat?