How could I improve my print quality?
The grey print was the standard gcode that was preloaded on the card. The green print is the latest, using .15 quality with support structures. Is there any way where I could get results like the grey version? Should I print without supports?
RE: How could I improve my print quality?
Your first layer should be lower, ie your live z adjustment wants going more negative. While this wont improve the quality it will reduce the likelyhood of a part detaching and causing a mess.
The treefrog is supposed to be printed without supports.
Beyond that, do the basics like calibrating your filament correctly. Also if you want the settings used for the treefrog you can use File>Import>Import Config and select the gcode file. That will load the settings from it that are stored at the end. Of course newer versions of PS will have settings that werent available when that gcode was created but most of them should still be applicable.