2018 Mitsubishi RVR Aftermarket Wheels

For a 2018 Mitsubishi RVR SE Anniversary AWC
2.4, the specs for the factory OEM wheel are as
follows; Size: 18x7J, +38mm offset,5x114.3 bolt
pattern, Center Bore: 67.1. 
I am looking at a set of aftermarket wheels that are
18x8's. I plan on putting the factory tires on the
18x8's, and buying winter tires for the factory
wheel. I know my factory all season tire will fit my
wider aftermarket wheel, but the new wheel comes
in offset options of +35 & +45, and bore options of
72.6 and 73.0. What, if any, difference will these
options make going from an 18x7 to an 18x8 /
which offset and bore would be better, And will I
require hubcentric rings?