I believe Apple ships the phone if I order from Apple. Verizon from Verizon.
If that's the case, we can choose whichever has a better shipping date. I wonder if Verizon is going to offer some sort incentive to order through them. What about the the dreaded Verizon fee for upgrading they always charge? Last time (2018) I had to call and express my disgust and then they removed the fee.