[Darryl Ramm]

I've already suggested several things you should look at.

Are you bouncing the main output? Did you check that?

Reimportaing the bounce into the session and playing from there. Did you try that?

Not using players with EQ etc. You are using Windows Media Player... did you check all the settings in that.

You need to make sure you are comparing stuff at the same SPL, as I also pointed out before. So get that into a Pro Tools session makes that easy. Elsewhere it's harder. But things like calibrating output levels with an SPL meter can help.... but no don't bother now, this will be something simple you are doing wrong.

I pointed out you should not be putting plugins on the master fader, thats not directly relevant here, but it's bad practice you should change anyhow. You can Google that question and find out why you should be putting plugins on an aux track before the master fader (OK I'll get you started it's because on a master fader plugins are after the fader, think/read why that's a bad idea).