Kioti has a couple weak spots on that series. The loaders crack and a fix has been in the works for over a year but is still not released to repair the cracked loaders. There is a newly designed loader coming out to replace the existing loader but may not be available yet so be vary wary of getting stuck with the old style LK130. The undercarriage on the CK is also known to be suseptible to getting their filters torn off, possibly because it has less ground clearance than many tractors it size?
The B2630 is a new series built on the B3030 frame. Its been out for a couple of years and I've not heard many complaints or compliments. One thing I have heard is that it has a very tight turning radius and my B2910 (the older version of the B3030) fits were others cannot. With brakes, these tractors have a turning radius under 7' which makes these B series handle better than every brand except the New Holland's with SuperSteer & Sensitrac options (and those are more expensive).
Be very careful when you compare the specs of the tractors, Kubota lists honest capacties instead of "pivot point" capacities. Pivot Point capacities, as used by Kioti on their loaders, inflate the actual lifting weights by 30% to 33%
I don't know if you are trailering the tractors, but the Kioti weighs about 1300# more than the Kubota so a B2630 can be towed on a 7000# trailer.
The CK25 weighs roughly 3140# with fuel, and about 3600/3650 with filled tires. The KL130 loader weighs 770# and the backhoe weighs over 1000# more. That means the TLB roughly 5320#, if a trailer weighs about 2000#, that brings the total weight up to 7320#. That all presumes you don't add any other equipement to the trailer. If you have a 10,000# trailer and a truck with that amount of towinc capacity then it is no big deal.
Interestingly, the Kioti, with all its weight, only offers about 100# more lift capacity on the 3pt hitch.
Never insult a man who has a bag of dog poop in one hand and a tennis racket in the other hand.