Ok, Ive tried on both there a bit big so if your a skinny person no go the other thing are you a sniper judging by your name you may be if so get a chest rig either RRV style or a battle belt and H-harness.
If you are rolling assault go and get a compact plate carrier its lightweight and gets the job done. I run a condor compact at the moment and I am a support gunner so I just load down on ammo I usually carry 10k rounds on me at a time so thats my opinion.