If you found that out, ok, do so. I would think twice, because if you were right, everybody would do it.
What about size, speed, range, upcoming major checks (D !) ,fleet commonality? So many things you didnīt consider.
Those planes are much too different in anything to be compared directly.
If you want to serve low density sectors nearby, itīs no question at all which of those two to choose. What about the rest of your network?
And considering buying new or used aircraft is simple math in the first place besides what used market has to offer.There are good and bad deals side by side.