I'm assuming since you are asking about specific units, its for deer. Cbond is right, they are very different units from an accessibility standpoint. If you want a wilderness experience either on foot, horse, boat, plane, etc... then 27 could be awesome. If you are looking for a truck camp, flexibility, mobility, ease of accessibility and scouting, then 28 is probably where you're headed. It's a huge unit with a very diverse landscape to fit pretty much any style of hunt you want.