What do these terms mean for planes?

So i was looking at the market and saw:

Boeing 737-700 HGW/BGW - (SCIMITAR/WINGLETS)

Airbus A320 Neo light/light sharp/medium/heavy

I was wondering if someone could explain to me what these different terms meant for the planes i was looking at

BGW = Basic Gross Weight 

HGW = High Gross Weight (basically a higher max take off weight as I understand it)

Same for Airbus. See different ranges and runway requirements.

BGW = Basic Gross Weight 

HGW = High Gross Weight (basically a higher max take off weight as I understand it)

Same for Airbus. See different ranges and runway requirements.

Ah ok, thanks guys