Shawn you are correct but... The 412 is a better example.
Another key identifer is the number of pax you want to carry and whether or not you are flying FAA part 135 (for hire). For instance the Bell 412 is certified to fly single pilot. You can do so as long as it is not able to carry more than 9 pax's as in VIP or EMS. However, once you have more than 9 seats part 135 requires a second pilot. The 430 can't carry more than 9 pax's thus doesn't require the second pilot as long as it has the appropriate equipment.
Chuck