So I just bit the bullet and grabbed the R5 Mark II because my old 5D was finally giving up on me but now I am totally stuck on what glass to actually put on it for this trip to Zion in two weeks. I keep reading that the RF 14-35mm f/4L IS is basically the go-to for hikers since it is so light and has that extra 1mm on the wide end which sounds great but then other people are swearing by the 15-35mm f/2.8L.

My logic was that since I'm mostly shooting landscape at f/8 or f/11 the extra stop of light doesnt really matter right? But then I saw some forum posts saying the 14-35 has some crazy distortion that the camera has to fix digitally and I'm worried that with 45 megapixels I'm gonna see some weird softness in the corners. I have about 2500 bucks left in the budget for this so I can afford either one but I dont want to carry a brick if I dont have to.

Does the 15-35 actually look sharper on this specific sensor or am I just overthinking the digital corrections? I really need to get this ordered by tomorrow morning to get it here in time for the flight...