Here are some figures for the B1900D from section IV (Flight Planning Data).
Climb to FL240 (ISA temp -33)
Time: 15 mins
Dist: 42 nm
Fuel: 255 Ibs (not including taxi or start fuel)
Prop RPM: 1550
ITT: 720
Climb Speed:160 (SL to 10000') 150 (10000' to 15000') 140 (15000' to 20000') 130 (20000' to 25000')
HSC Cruise at FL240 ISA
TAS: 275 Kts
Fuel Flow: 774 Ibs/hr
Prop: 1550 RPM
And some figures from the J32 Crew Manual
Climb to FL240 (ISA)
Time: 26.1 mins
Dist: 82.7 nm
Fuel: 146 kg (321 Ibs)
97% RPM
TQE: 96.1% at start, 52.9% at F240
Flows Postion 5
HSC Cruise at FL240 ISA
TAS: 243
Fuel Flow: 258 kg(568 Ibs)/hr
97% RPM
So based on these Flight Manual figures the B1900D wins hands down. It is common knowledge that the 1900D out climbs all the other 19 seat aircraft and most of the 30+ seat aircraft such as the Dash 8-100/200 and Saab 340 A/B.
I have flown the 1900D and the J31 (not the 32), and I've found the 1900D likes(needs) to be flown at F200- F230. The J31 and the J32 (we are currently do a route study) likes( works best) between F150 and F180.
When looking at field performance the 1900D takes a big hit if you don't have anti-skid fitted. This option, which most 1900D that are on the market (being ex-US aircraft) don't have will set you back $80000 USD to fit. Anti-skid is standard on the J31/J32. If you want to fit an Autopilot to a B1900D it will cost you $200000 USD. Although the Autopilot is an option on the J31/32 most operators in Europe have it fitted. The US operators didn't, but it will only cost $60-80000 USD to have it fitted on the J31/32.
With regard to galley's, the company I flew the 1900D had a few of theirs fitted with a scaled down galley area in the front coat area. We handled out cold drinks and sandwiches.
The big difference in the aircraft is cost. The current average price of a used B1900D is $2.2M USD. A J32 will sent you back $500000 USD, so you can buy 4 for the price of 1 1900D.