bulldogger, cat 55 to a 8410, there is a lot of differences, The cat has a better undercarriage design, without getting indepth on it just look at them and compare. If you are going to rowcrop with it you will probably be out to 120 inches. The way cat gets there is to add spacers bolted into the hardbar(ie axle) compared to the deere that uses pretty much a rod with holes in it that you move, and the rod that runs from the front "axle" to the rear axle, all I can figure out is to keep it from twisting. The cat does have a flip up hood easy to get to, cat does make their own tracks deere doesnt, cat is a smoother ride, deere is welded solid so you feel everything, Cats drive system is superior, three point is heavier built. I will give deere the cab features, more glass finger tip hydraulics which are very nice, and cat uses that parking break handle but it is simple and it works. The cat cab comes from the same place NH get theirs for the Genesis tractors, it does have a nice powershift handle beefy something to grab on to which is nice, sidewinder console is nice, has a wider cab door opening, is a solid cab as you slam the door, both tractors have a terrific transmission, cats is a funk, who is owned by deere, both are smooth. Power wise all I can say is that I have never hurt for power in a 55. one thing that I can say is that the 55 was designed and built as a track tractor not an afterthought. Deere guys hope I didnt hurt your feelings but the cat sight isnt up yet. Sorry