I'm for sure in a minority but I don't agree that tractor weight is the most important criteria at all. You can always make a light tractor heaver but you cannot make a heavy tractor lighter. For mowing my lawn I want my tractor as light as possible. If I need extra weight for stability or traction I can always pick up my rear three point hitch weights. If I need more weight up front I have two different sets of front weights depending on the job. The two most important considerations are: How well the dealer takes care of you and is able to supply parts, and how comfortable and intuitive the tractor is to operate. For example I will never buy a treadle pedal HST tractor. Others find them comfortable but I don't. Also very high on the list is reliability.
Focusing solely on weight, as in more is better, is a rather simplistic or one dimensional approach to selecting a tractor. When I bought my ck 4010 Kioti a few years ago, I narrowed my choices to that tractor and a larger framed NX series, after looking at Kioti, Deere, and Kubota.
Deere was out, as they wanted too much money and didn’t want to deal. Take it or leave it approach to selling.
Kubota was out due to the treadle HST control, and a dealer in precarious financial position, reportedly from divorce proceedings.
The CK was a lighter tractor than the NX, but much of my lakefront property had questionable drainage, so I figured the smaller tractor had an advantage. The front snowblower was a little narrower, but the tractor was a little smaller and easier to maneuver near the deck and house, and was a better fit in the garage/shop. The blower and subframe, being slightly smaller, were a better fit for covered summer storage.
Lift capacity and bucket reach were not as good, but still adequate. I can load my small dump truck with no issues other than the limitations of the smaller bucket... it takes a few more scoops to fill the bed with sand.
Biggest downside from my choice of a smaller tractor is the tighter cab and the floor isn’t flat, making the cab a little more restrictive. Additional weight would help when using the box blade, but, again, that’s limited use for me. Snow blowing was my primary objective.