Hard not to like the NX....doesn't mean someone wouldn't have reasons to prefer a Grand L, but would be a stretch to call one or the other vastly superior.
For your price quotes, what I found was Kubota was real similar in cash vs financed price. Kioti was a huge difference (like $4k less for cash price at the NX size). So how you are paying will be a factor too. If you're going to write a check or finance some other way than dealer, make sure you are comparing cash price to cash price. My dealer was real good about being upfront about pricing and clearly stating "cash price is $X, 0% Kioti finance price is $Y". But have heard from other members who had problems like their dealer quoted them cash price, but at delivery time were surprised with the higher 0% price tag. Also, make sure you spec both machines same way to get true comparison. Like if you want the rear remote, NX comes with it standard, upcharge on Kubota. Industrial tires, filled tires, delivery were small upcharges for Kubota but included with price for Kioti. So I had to tell the Kubota dealers specifically how I wanted the machine to get true apples:apples.