I'd pick the Dealer First, then the bike.. service after the sale a primary criteria.

Same shop sell Both?

tires , new take offs have trade in value ..
to offset retail (-10%) if bundled with original purchase,
as would equipping Mudguards and racks also be priced down
10% with bike purchase, N/C on fitting labor.
likewise saddle , pedals . stem length, and,
other changes from what came out of the OEM carton.