I too agree with
@John Grace
The SN2 is a larger and better chuck than the G3 and if you're like many of us, the turning addiction will lead to more chucks later. Keeping them "in the family" is great for jaw interchangeability. (I have many, used to be about 20 before I gave some to friends.. I don't like to change jaws. And I often have wood mounted in more than one chuck at a time.)
The newer version of the Supernova 2 has reversed the gearing so the turning the key clockwise tightens the chuck on a tenon. I understand this is more in line with other chuck mfgrs. The direction was never an issue for me since I always thought of it turning clockwise tightened into a recess, my normal holding method for face turning.
Now that I have some that turn the other way, I use a vibrating scriber to make an curved arrow at each key socket pointing to the direction that opens the chuck and draw over the arrow with a red Sharpie and write the word "OPEN" on the chuck body. This way I always know at a glance which way is which.
Even if the newer SN2 lite has the opposite direction from the G3, it's shouldn't be a problem. And if, or rather, WHEN you get another new chuck or two in the future they will likely turn the same way.
I also agree with
@Michael Anderson about getting the insert version. I had some G3 chucks with inserts I used at times with one of my mini lathes, then installed inserts for the larger lathes. When I gave the G3s to a friend with a smaller lathe, I simply put the smaller inserts back in. If you switch to a larger lathe later just buy the new insert.
Another possible advantage of the inserts with the chucks I use, but I'm not entirely sure about the other Nova chucks that are direct threaded. All of my chucks were the insert versions except for one big Nova Titan which was only available as direct threaded. The problem I had: I use a chuck wrench when removing chucks from the lathe, often with wood still mounted in the jaws. My wrenches fit the hex surfaces on the end of all the Nova chuck inserts. However, the direct threaded Titan did not have a way to use the wrench. I was about to put it on the milling machine an mill some flats for the wrench until I decided to give the Titan to a friend who liked to turn large things. Being able to use the wrench might not be important to you, but for me it's a way of life. Unlike some, I have good reasons to loosen the chucks with a wrench.
JKJ