This has been reported (by me even) and like this (Same account that is Linked / Different accounts that are not linked)
GEMS ONLY DIFFERENCE
PC English US
Daily Gems - $4.99
Stack $4.99
Bag $9.99
Chalice $19.99
Chest $49.99
MotherLoad $99.99
Android English US
Daily Gems $4.99
Stack $4.82
Bag $9.65
Chalice $19.99
Chest $48.27
MotherLoad $96.54