Core or Lite should be OK.
As stated above, Core has Gnome Desktop Envionment and Lite has XFCE Desktop Environment. Both are fully functional, don't be put off by the word "Lite", as that just refers to lighter use of resources, not funtionality.
I suggest you try both and see which you prefer in terms of look and performance on your specific laptop.
If new to Zorin and Linux, I would also refer you to this pre-installation advice: Before you install