Having flown both types I would have to say that the Twotter beats the Bandit hands down.
The Twin Otter cruises at about 160 kts TAS (as opposed to about 190 TAS) and offers alot of flexibility and cost advantages for AeroPelican in a single type, easy to maintain operation.
The Bandit uses alot more runway, is more expensive in terms of maintenance and lacks the flexibility that the Twotter can provide.
They have had the formula right for a lot of years with the correct aircraft for their particular operation.
Lets hope they have a long and fruteful future.