Round or flat roof?

Hey guys,
Lots of great info here. I’m starting to look for a 6x12 to convert. The round roofs seems to be like they would be more resistant to leaking, how are the flat ones? Should I be avoiding flat roof trailers in my search?
I already have a 7x16 with a round roof that I use to haul stuff around that hasn’t leaked a single drop in 6 years so I’m kinda leaning that way.
Thanks!
Lots of great info here. I’m starting to look for a 6x12 to convert. The round roofs seems to be like they would be more resistant to leaking, how are the flat ones? Should I be avoiding flat roof trailers in my search?
I already have a 7x16 with a round roof that I use to haul stuff around that hasn’t leaked a single drop in 6 years so I’m kinda leaning that way.
Thanks!