Personally I'm leaning towards the 6.7" model. It's hard to go smaller once your eyes are accustomed to the larger screen. I do think the 5.4" model is extremely intriguing and will be the smaller iPhone that many people have been clamoring for.
I’m in a dilemma of how many phones to buy at the end of the year since I usually buy all my phones then. So I’m considering buying more than one iPhone and more than one Samsung phone. For me it’s just a matter of how far has 5g come and what phones support which or all bands.
If the 5.4 inch iPhone debuts this fall, it’s a ‘day-one’ purchase for me. Large smart phones are not in my agenda for the future. My iPads can serve any larger viewings for media/workload.
I always go for the biggest iPhone so getting a 6.7 seems a given. But I’ll admit I’d like a 6.1 phone. I wonder what the battery life difference will be. If it’s 1 hr I might go 6.1. But if it’s bigger than that I’ll go 6.7. I have an 11 in iPad so 6.7 seems less important.