So I'm planning to get this bike, possibly the later 2017/2018 model:

<http://www.polygonbikes.com/id/bikes/description/2016-strattos-s3-black#spec>

Which is a well known local brand and practically any bike shop near here should carry one.

Anyway, the bike has more of an endurance geometry, though I wanted a more aggressive one, they don't have one at this price range.

The question is, can I simply swap the stem to drop stem (negative rise) and move the stem down the spacers to get to a 'performance bike' position? or will it still be a different geometry altogether? I can't see much difference in the final position vs an actual performance bike, but I might have missed something.

If it makes a difference, I will be using this bike mainly for 'commuting' to work (I usually ride hard on threshold anyway), some climbing practice, and maybe a few amateur races just for fun.