7700x to 7800x3d or 7600x3d

wanting to build a new pc I have a 7700x right now and can buy the 7600x3d or 7800x3d for 200 and 320. would it be worth upgrading my current pc right now is going to a friend who mostly does work or another option is I buy a 7600x (150) and keep my 7700x.