SWATs all the way. I used to be a huge fan of magnum, picking up my first pair of Stealth II's in '07 when I first got my boot chit. They were GREAT!! However, after giving them hell for three years, and getting jacked up by a few RSM's, I finally had to switch out. I found out, at the time they no longer made the Stealh II's and had to go with the Stealth Force. Wasn't a big fan of the look, or the price (over $200 if I recall), but was a loyal user. I got the same size, and wore the same socks, but they destroyed my ankles. I tried returning them to the shop I bought them from, but they wouldn't take them back because they had been worn, (2 days, and a coat of polish). I was told to contact Magnum, and that they wouldn't f*ck over a military guy... long story short, they f*cked me, and I still have those damn boots... But I also own 2 pairs of SWATs, and will never go back. The SWATs aren't as cushy as the Magnums, but personally i think they look better, they're sturdier, and they don't rot as fast.
In the end, it's definitely personal preference and whatever your feet like more, but so far I have found that SWATs are way better quality over-all and better suited for a military boot.
Just my opinion of course