Since I owned a 1610D for a short while and now a JD 790 I do have some experience with this subject. The 790 is definitely a Yanmar, same control positions but bigger, wider, heavier, more HP and little things like float and joy stick control, PS, all safety items, FWD and Diff lock on the go, regen hydraulics, bigger platform, key shutoff, auto prime, bigger tires, live PTO, steel lines on loader, zero interest loan, etc. Better than the 1610D in every way except the tranny, which was certainly much better on the 1610. However the biggest things with the 790 is that it is new vs 30 years old and it has a local dealer with a full warrantee all for less than twice the money. Parts were readily available online for the 1610 but I needed a lot of them. My experience with grey market wasn't very good, many have had a very good experience. I wouldn't do it again w/o a dealer who was close, w/o seeing the tractor first and w/o paying a lot less than 1/2 as much as new.