I am just curious, if you really prefer the size of the Pro, do you consider the tradeoffs to the Pro Max truly worth it? They have the exact same cameras and the Pro Max only offers 2 hours more video playback (up to 20 hours vs up to 18 hours of the Pro).
I went form an iPhone 6 to an iPhone 7 Plus because that year you had to get the Plus to get the second camera and I thought "Maybe I'll like the bigger screen."
The larger screen is certainly nice, typing on it is easier, web browsing and everything else is certainly a better experience, but I never really got used to the size and the weight. I carry mine in my pocket and it was big and heavy, even with a relatively thin case on it. I also am not a big person with big hands. I found I had to have a pop socket on it to handle it.
So when he X came out with a larger screen in a smaller body with the same camera options as the Max, I was excited to get back down to a smaller phone. I personally value portability over screen size. If I really want a larger screen I turn to my iPad 9.7" that I got during Black Friday for about $300is. I'm just not the kind of person who spends hours watching video or doing a lot of things on my phone. I have computers and tablets for that heavy lifting.
So each to his own on preference, but these are factor to consider. The Max really is a very big phone, especially if you have a case on it. I still look at those and wonder how my friends can carry them, but some of them are big guys. However, if you really want a great sit-down experience with a phone or do a lot of photography and video and want the lager display or that, the larger is likely going to enhance the experience.
Heck, I even considered the iPhone XR or iPhone 7 for a few minutes but I'm not sure I even want a 6.1" phone. Besides, I really value the "2x" camera above most else.