Kind of? It really depends. what you want to use it for? For 130 more, you're getting an i7 and 2gb more of vram for the gpu. So gaming will feel better on the 574g, and so will some applications like Adobe Illustrator or something, but by no means will it be above and beyond what the 573g will offer.
It's more or less up to you. Do you want to save money, or do you want that bump up in performance?