Personally I go TTS on foams.
If you choose to go TTS They will be very tight at first & they're really hard to break in; sometimes they even straight up hurt your foot. However after a few solid wears, it will be one of the most comfortable shoes you've ever worn. Like you're walking on air.
The foamposite material is designed to be molded to the shape of your foot. So I personally go TTS to get the most comfortable fit later on down the line. If you go .5-full sz up, they won't be uncomfortable at all, so no worries about breaking them in. But they also won't be an accurate fit molded to your true foot size.