You are correct - inverters have a value (measured on the DC side) at which they will turn on. This is nothing to be concerned about - either value is just fine, they are not producing much AC power at those input values, but if that is something you want (to be able to produce tiny amounts of power) then the lower value is the one you want.
If you can post the model numbers of each inverter I can confirm the numbers for you… eg
shows the ‘startup voltage’ is 200vdc, but adjustable from 120-350vdc.
Ideally - get one which will allow you to get the most of your roof - dual mppt is ideal if you have multiple roof pitches which will get sun - allowing you to add more panels later…
my advice to you - is to make sure you have no shading of your panels. This is far more important than the startup voltage of your inverter.
Building a system with shading will gravely reduce the ability to produce power (unless you pay extra for sub string tracking devices).