Drop stem on endurance bike to get the geometry closer to road performance?
Yes, you can get a more aggressive riding position by dropping the stem down on the steerer tube, and swapping the stem for one with a larger angle (and possibly a different length). 

Bikes typically come with 3 5mm spacers, and swapping from a 6 to 12 degree 100mm stem drops an additional 10mm, so you should be able to easily drop the bars by 35mm.

What we cannot tell you is whether you will be able to get the bars low enough for you. I suggest that you use you current bike as a baseline if it is set up the way you like it. Measure its stack and stem rise, then compare that to the bike you are looking at. Also, go get a test ride if that is possible in your location, or at least sit on the bike and get a feel for the rider position.

There are other differences in steering geometry between the bike you are looking at and the higher end ones. The higher end ones have slightly steeper head tube angles and will have slightly quicker steering. Again, you will have to determine if that works for you.