RE: Clothing for deer hunting
I have to repeat the advice someone gave you that you really need to know what your state requires. I wouln't assume anything. Some states require solid, some allow camo. Some allow camo as long as the blaze part meets the square inc requirement. For instance, the blaze requirement could be met with a vest and cap, but you choose to go blaze camo, you might have to wear a full jacket and cap.
Every state is different. Don't listen to anyone who gives you advice based on what they think seems reasonable or makes sense. Game laws don't always make sense, and the people enforcing them may or may not be "reasonable" people when it comes to making judgements on citations and the "spirit" vs "letter" of the law. Stick to the letter of the law in your state.
I personally prefer blaze camo and do feel it is better at concealment. I'd even go so far as to say that for deer's eyes, blaze camo is probably as good as any natural color camo, maybe better than a lot of them because it is a simple light/dark break up for the deer's eye (which I think is generally best regardless of the color). The blaze color probably looks similar to a neutral grayish/brownish hue to the deer. Straight blaze has the risk of looking like a light gray blob and a simple, sparse, dark spotting pattern turns this into an excellent break up camo. Many so-called natural camo patterns are far too dark to effectively break up your figure in the woods. You end up looking like a dark siloutte.
Based on me watching people walk through the thick woods in dim dusk/dawn light, I am also very confident that blaze camo is just as visible as straight camo - they're both extremely visible and I can't tell any difference in how soon or clearly I can see the person whether they're wearing straight or camo blaze.
All that said, if you're still, use the wind and also use the woods to help break up your siloutte, plain blaze won't cause you any problem. I regularly get out hunted by people who wear full plain blaze coveralls and cap just because they're better hunters. It's not a huge factor either way.