Surf shirt vs. rash guard

Is there even a difference??
From what I understand there are two types of protective shirts you'd wear in warmer surf. There's a loose fitting short sleeve style shirt and there's a form fitting style that I've seen both long and short sleeved.
They both seem to come with SPF protection.
Are there any key differences between them where you'd pick one over the other?
I'd like to get something because last time I was surfing I ended up with a raw nips and wax in my belly hair and I could skip that on my next trip.
What do you like to use? Why? Any advice I can get would be awesome, I'm trying to avoid buying something to find out I really want the other.
Thanks ladies and gents!!!
****!!!! Oh, any girls here??? What do you like? Any girl specific advice I can give my lady would be great!
Thanks again,
Martin
From what I understand there are two types of protective shirts you'd wear in warmer surf. There's a loose fitting short sleeve style shirt and there's a form fitting style that I've seen both long and short sleeved.
They both seem to come with SPF protection.
Are there any key differences between them where you'd pick one over the other?
I'd like to get something because last time I was surfing I ended up with a raw nips and wax in my belly hair and I could skip that on my next trip.
What do you like to use? Why? Any advice I can get would be awesome, I'm trying to avoid buying something to find out I really want the other.
Thanks ladies and gents!!!
****!!!! Oh, any girls here??? What do you like? Any girl specific advice I can give my lady would be great!
Thanks again,
Martin