It looks like you are in the $3K range! you may want to check out Chain reaction (out of Dublin, Ireland) Great prices and you can get more for your money. I picked up an XT level Cube Stereo, 160mm Fox travel F/R for $2K last year. I love the bike and very glad I went Enduro geometry. here is a killer bike for the same price range http://www.chainreactioncycles.com/us/en/cube-stereo-140-c-62-27-5-sl-suspension-bike-2017/rp-prod154568
Just so you know Chain Reaction has the best customer service. When you order a bike it comes in around 2 days. it is set up ready to ride, you just have to obviously unpack and put together the handlebar and put wheels on. Mine felt a little weird on the brakes so I pinged them and they told me just take it to a LBS and send them the bill. they understand that folks live all over the world that order from them so they take care of you.
FYI… to answer your question, Trail to Enduro to Downhill is a change in geometry to have the front wheel stick out further and a change in wheelbase so that as you travel more aggressive (steeper) hills the fork is hitting relatively perpendicular to the ground and it allows the bike to soak up the bumps better so you have more control on the hills. You can probably look up the difference right here on singletracks.
Last, if you are choosing between the Trek or Scott, I would take the Scott.