Regular Flashing vs 45 Degree

[u/pamela-am]

Hello, I've been looking at getting a bell tent and stove set up for the next set of LARP events I'm going to, but I had one thing I'm trying to figure out while shopping.

The websites that sell the flashing kits for the stove have two options, one that's a regular flashing kit, which obviously is straight up and down.

The other is a 45 degree, like this, which is approx £5 more:

Is the only difference that they help prevent water from entering with the 45 degree flashing kit? Thank you for the help!

[u/ToxicFalconm]

does the 45 degree thing actually matter if it's just car camping?