Tractor sizes you can find in this thread in a table:
https://www.orangetractortalks.com/forums/threads/bx-vs-b01-vs-b50.36719/
(I made that a few years back. The B50 series is now known as the LX).
Basically the sizes are:
- the BX, which is a bit smaller than a 1 series. It's sized so that your wife doesn't notice you bought a tractor instead of a ride on lawnmower. No factory cab is offered.
- The B01 series (B2301 at 23hp, B2601 at 26hp). Not much bigger on the ground than a BX, but larger wheels, more clearance etc. It's between a 1 series and a 2 series, closer to the 2 series. I believe no factory cab is offered.
- The LX series. LX2610 (26hp) or LX3310 (33hp). A little larger than the 2 series I think. You can get a factory cab.
- The L series. This is an economy tractor, it's much more bare bones than the B or LX in terms of features, but it's a lot more metal for your money. No mid PTO, no factory cab. A new version just came out, so you have L3302 and L3902. There's also still the L2501 (no DPF, but old version) and L4701 (more HP than you really need in that size tractor, and also still the old 01 version). There's a few comfort features in the 02 model, but the big change is moving the split brakes to the left hand side so you can use them for steering on an HST
- The grand L series. This is a really nice machine - Lxx60. L3560 (35hp), L4060 (40hp), L4760 (47hp). These have a really nice transmission in them, a factory cab is available and is well regarded. This model is a bit long in the tooth (due for replacement) but is still very feature rich. Somewhere in that range there's a larger capacity FEL, I can't recall if it's the 40 or the 47 that gets it
- The MX series. Getting into big tractors at this point. There is a cab available, but it's a lot larger than you're looking I think
There's a couple of special utility (SU) models in there too that are stripped down one way or another.
In general terms, Kubota v's JD, there's pros and cons.
JD don't actually make all the parts on their smaller tractors, I think the 2 series might be an Iseki, or at least used to be? Kubota make all the main assemblies on their machines, and you can still get parts for Kubotas going back decades. If (when?) JD move from Iseki to someone else, I wonder about parts availability.
There's the HST pedal, some people feel very strongly about it. I don't mind, but on my B01 I do find the treadle a bit stiff, it can give my knee a hard time. I don't think that's treadle v's two pedal, it's the spring in that particular model.
On the 1 series JD have a really nice drive over autoattach for the mower deck. I'm not a massive fan of that though, and my B01 has a drive over deck, it's just not auto attach. I think the single lever manifold on the loader makes it easier to remove on the Kubota. In the US people really like the SSQA, where JD tends to sell proprietary attaches. Not sure it matters that much though, and I actually ended up with a Kubota pin-on quick attach, because in my country SSQA attachments for small tractors are basically non-existent anyway.
Kubota loaders have a good reputation for finesse, perhaps better than John Deere.
Some John Deere models have plastic panels. All Kubota are metal. The John Deere plastic actually seems pretty good. The one Kubota model that was plastic (BX2350) I had the misfortune to own, and the plastic was not good - they went back to metal quickly.
Ultimately, they're similar. Usually you'd pick one over the other based on colour/gut feel, or because there's a specific feature you want that isn't in the other colour (like a 3 speed gearbox, or a position control 3ph, or a factory cab). Sounds like that's where you are.
Kubota I think are the largest manufacturer of small Diesel engines in the world. The engines are very very good. And they're Japanese (although the small tractors are made in USA), the engineering is very tidy. In the smaller tractors Kubota has been making the same machines for nearly 30 years, gradually refining them all that time. They are nicely made and well thought through.
EDIT: The LX model has a digital dash. Not a fan of that. The B01 is analogue, but no factory cab, so....