Now your Stryker looks like what i was talking about
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. Don't worry about the wash. It's normal that it get's toned down by dust weathering. Next time just apply a darker, more intense wash for more contrast after the weathering.
On your latest pictures the wash and the contrast are still visible. So you shouldn't try to correct anything. Too much contrast on dusty surfaces looks just unrealistic and toy-like.
So much for the vehicle itself. Let's take a look at the tyres. The dusty look comes very close to the example picture shown by you but what they could use is a SLIGHTLY wash 'cause it's hard to spot details like the Micheling lettering and the structure of the sides.
Please understand it as my opinion and not as hard critics. Your result is really nice so far. I wish i would archive such nice, dusty looks on my models. With pigments i always get the look of small, dried out puddles. It just doesn't look realistic and evenly. Guess i have to do some more practice...