V-neck is not as deep, which for all intent and purposes I would rather go with a loose crew or u-neck. From some of the Uniqlo v-neck WAYWT photos it is probably on par.
I just got to go back to the basics and wear what works. Bought one last year from B&S for a mere $10. This is the true stuff. Will see if Uniqlo v-necks are a challenge come September.
And at ~ $12 it just beats Everlane in terms of fit and quality. Thick 100% supima cotton, soft (Made in Jordan) and washes well. My old one currently has lasted and retained its shape pretty much 99%. Again it is on the thick side, which I personally love.
I'll note that since everyone on StyleForum is a diehard gym enthusiast or rail thin and have double-digit drops (I have only about 5-6" or so), this tee may not be for you.
Size TTS, I wear a small. Some say it is vanity sizing.
ANYWAYS, I bought them for the gym or what usually happens is I change out of my day clothes and into a tee then precede to go to the gym with what I'm lounging in.