Uh, they do not deliver any wood here. In many cases they do not even buck up the rounds on site any more. Firewood is hunted down by the mobs and hordes of wood zombies here. I have a few friends that cut trees and call me or I get leads from Craigslist. Some are duds, some are gems. Arbor guys here (meaning mostly Mexicans now) do the least amount of work possible, and do not have good skills or training from what I have seen. They climb with 660 saws with 36 inch B&C and hack and swak away on 8 inch limbs. They leave messy cuts. They leave stuff in long lengths. Which is fine with me, as I have the saws to buck and noodle them into manageable rounds that I can toss into my trailer and deal with later. If I am lucky and get a call from an old school arborist, and they have a mountain of bucked up rounds that need to be removed. I halve, quarter or cut them into 9s depending on the size, and haul them off for further processing here. I usually have 6-7 cords of wood here, enough for 2 years of heating. I always season them for at least a year, usually two, depending on the species. In November I got a cord of old growth western hemlock nicely bucked, in December I got a cord of maple that I had to cut into 9s from 6 foot rounds that I bucked from a huge log, and I just got a cord of cedar rounds that the owner thought was pine. Cedar is slightly better than pine in most cases.
Tree ID books are good. I have a half dozen. I know all the native species here, but there are so many eastern and European species planted here in the burbs it is insane. People rarely know what they are. I got some mimosa wood with some maple a few years ago and I had never heard of that. It burned good though. It is invasive as all crap here. I now have a lot of black locust that I got as well. Pioneers brought that and planted it here, and in many areas out here where there are nothing left of the towns that were here 100 years ago, all that is left are stands of black locust. Nobody knows what that is here any more though. I got a half cord of cut, split and seasoned black locust from an arborist 2 years ago. I could not believe my luck. He just said it did not burn well in his stove, and said that I would need a good stove to burn it in. Phuuut! Got me through the polar vortex last year. Burned great.
As for X-mas trees, if they are that small they are likely not worth the effort to cut and limb. That will be pretty light and pithy wood as well, and not very dense. If it were a hardwood it would be different. Smaller tree tops and limbs like that I just burn here in slash piles.