I have flown lots of both the 230 and 222 and I could give you precise information but I need more precise info, like altitude and temps to be operated, and the area where you will be taking off and landing, do you need hover OGE performance? When taking off from a misson can you make a running takeoff (not saying drag the skids, just gain speed while in hover)
For example, either machines are real pigs at altitude and you can carry much more/longer in a B407. At 7,500FT, 20ºC the B230 can Take off OGE 7,750 LBS and the heli itself weighs almost 6,000 LBS, then to make matters worse every 1ºC above this temperature is 50LBS less than you can carry! But we need this performance because of the elevated rooftop helipads, maybe you have a flat surface to gain speed.
Then there is the 222SP which has B230 engines, it has slightly better performance. B230's are really hard to get, there were only 36 built, and EMS outfits are constantly searching for them.