I discovered the Yanmar line while going to check out Kiotis. The dealer, who was selling both, actually steered me over to the Yanmar. The dealer told me he was having trouble getting Kioti tractors and there seemed to be a lot of drama of Kioti dealers being dropped, at least in my area of the country. The regional Yanmar rep was also onsite, so maybe that also had something to do with it.
I test drove both the DK45 and Yanmar LX4900 while I was at the dealer. The Yanmar seemed more comfortable and easier to maneuver. I had never heard of Yanmar until that point, but the more I dug into their 100 year history, and their relationship with building tractors for John Deere, the more I became interested in them.
As for the Cub Cadet thing, selling Kioti built tractors didn't work out for Bob Cat. And before Cub Cadet was selling Yanmars, they were selling Kiotis. I guess Kioti didn't work out with Cub Cadet either. I don't think it really matters. Yanmar has stood behind the tractors they built for Cub Cadet and still warranty and support them. Note, the LX4900 was never a Cub Cadet branded tractor, it was only released under the Yanmar name and will only have Yanmar part and serial numbers.
Don't be fooled by the weight differences of the tractor. The Yanmar is a stout machine and there are no aluminum parts that I can find. The transmission and axle housings all attract a magnet. It does save some weight with its polymer hood and fenders, so you know more of its weight is where it counts, in its frame a drivetrain components.
Yes, expect to pay about $1100-$1200 for the dual-rear-remote kit. Soon I will be writing up the install of this kit on my LX tractor.
The Yanmar LX has a loader level indicator. It's on the inside of the right loader arm.
Re fluids, sight balls, etc. My Yanmar LX hasn't leaked a drop of gear, engine, or hydraulic oil so far in almost 150 operating hours. The front axle has a dip stick that threads out. The engine and gear oils are checked on the "cold side" of the tractor away from any hot exhaust parts. The hydraulic/transmission fluid is checked by a dipstick in the rear. I performed the "free" 50hr oil and hydraulicfluid and filters myself, it was pretty easy. You'll want a bucket pump for the hydraulic fluid. Quarts of oil stand up by themselves on the oil-fill port which is nice if you're trying to get every last drop of oil out of the quart container.
I do believe, with its direct-injection, the Yanmar engines are more fuel efficient than the Kiotis. And I've said before, the Kioti engine has a bore and stroke suspiciously identical to the Kubota engine. That tells me some engineer was doing more copying than innovating. With the Yanmar engines, however, you do see a little more PTO hp loss, I'm not exactly sure why that is, perhaps it has to do with the fact the Yanmar engine is a more square/power stroke design, so its putting out less horsepower at PTO speed while the engine is actually capable of higher rpm speed than the Kubota/Kioti engine. Or perhaps Yanmar is just being more honest about its PTO horsepower. In any event, my LX4500 can run a 6 foot bush hog just fine, on steep hills, so I'm happy.
I'm not going to try to address turbo/vs non turbo, but if you decided non-turbo you could always get the LX4500 model.
Look into the synchro-throttle feature. I don't think the Kioti has this. With the synchro-throttle you can control the engine speed with the foot pedals, like a car.
You may be interested to know that the Yanmar LX backhoe is actually made here in the USA by Amerequip in Wisconsin. Here's a link to a picture of the loader on their production floor:
http://www.amerequip.com/assets/images/photos/galleries/production/amerequip-collection-14.jpg
That's all I have for now. Hope that helps!