Jhd162g , jhd162g m7, jhd162a differences

Can any one help difference between jhd162a jhd162g and jhd162g m7,
D0-d7 starting from one sidd in g7 but 162a has power supply pins from both pins ends& dat n others r in between,
What about jhd162g
What r differences,
M7 is three times costlier than a jhd162a

What is this for a device?
Do you have a link to their data sheets (assuming those exist)?

JHD162G == Large Character LCD Screen
Jhd162a == smaller

look at the connector in the image
estimate 2x larger.