Every published spec for both machines, side by side. The verdict below is computed straight from the spec sheets, not opinion.
Across 8 measurable specs, this matchup is a dead heat: 2 categories to the Kubota B2301HSD, 2 to the Kubota B2601HSD, 4 tied. Machine pages: Kubota B2301HSD and Kubota B2601HSD.
Every published spec, side by side, including the details the graphs above don't chart.
Spec
KubotaB2301HSD
KubotaB2601HSD
PTO Power
17.5 hp
19.5 hp
Alternator
Not Published
Not Published
Air Cleaner
Dual paper element
Dual paper element
Engine Type
E-TVCS, liquid cooled, 3-cylinder, diesel
E-TVCS, liquid cooled, 3-cylinder diesel
Fuel System
Not Published
diesel
Displacement
61.1 in³
61.1 in³
No. of Cylinders
3
3
Rated Engine Speed
2800 rpm
2800 rpm
Cooling System Type
Pressurized radiator
Pressurized radiator
Engine Manufacturer
Kubota
Kubota
Engine Power (Gross)
20.9 hp
24.3 hp
Engine Emissions Constraints
Not Published
Tier 4
Weight with ROPS and Loader
Not Published
Not explicitly published as a combined ROPS+loader figure in sources found. Tractor-only weight is 1,632 lb (740 kg).
Weight with Cab and Loader
Not Applicable
Not Applicable
Warranty Length & Coverage
Non-Commercial Home & Residential Use - Basic Standard Limited: 24 months or 1500 hours; Limited Powertrain: 72 months or 2000 hours. Commercial Use - Basic Standard Limited: 24 months or 1500 hours; Limited Powertrain: 36 months or 2000 hours.
Non-Commercial Home & Residential Use - Basic Standard Limited: 24 months or 1500 hours; Limited Powertrain: 72 months or 2000 hours. Commercial Use - Basic Standard Limited: 24 months or 1500 hours; Limited Powertrain: 36 months or 2000 hours.
Pump Type
Dual pump
Dual pump
Steering Flow
Not Published
Not Published
Implement Flow
Not Published
8.3 gal/min total - open center dual pump system shared between steering and implement circuits; individual split not published
Total Hydraulic Flow
8.3 gpm
8.3 gpm 31.4 lpm
Hydraulic System Type
Open center
open center
Rear Remote Hydraulic Flow
Not Published
8.3 gal/min (total system - individual remote valve flow not separately published)
Overall Hydraulic Pump Flow
8.3 gpm
8.3 gpm
No. of Optional Remote Valves
Not Published
1 (single rear remote is optional)
No. of Standard Remote Valves
Not Published
Not Published
PTO Rear
540 rpm
540
PTO Type
Independent
Independent
Lift Control Type
Position control valve
position control
Hitch Lift Capacity
1808 lb
1808 lbs.
Mid-PTO Availability
2500 rpm
independent, 2500
Category, 3-Point Hitch
Category I
I
Hitch Lift Capacity (at 24”)
1411 lb
1290 lb
R3 Turf - Rear
Not Published
22x8.50-12
R3 Turf - Front
Not Published
22x8.50-12
Tire Size & Options
R1 Agricultural
Ag (R1): 7-12 front / 11.2-16 rear; Turf (R3): 22x8.50-12 front / 22x8.50-12 rear; Industrial (R4): 23x8.50-12 front / 12-16.5 rear; also Goodyear R14 hybrid multi-purpose tire available