If you're standing in a showroom running your hand along a few tops trying to decide between the metal base and the wood one, here's what I'd say: pick the base for how it'll sit in the room empty, because that's how you'll see it most of the time, not just when it's set for dinner. A modern table lives or dies on its legs and its surface, and both of those should feel solid under your hand before you ever sit down at it.
On finish, I've gone back and forth more times than I'd like to admit, but the ones that wear best in a real house are matte black or dark bronze metal bases paired with a light or mid toned wood top, oak or ash rather than anything too orange or too white. Pale finishes show every ring and scuff within a season, and high gloss shows dust like nothing else. A warm wood top with a simple black frame hides daily life without looking like you're hiding anything. For care, wipe spills right away, use a coaster for anything hot or acidic, and every few months go over wood tops with a little furniture oil or wax depending on the finish, it keeps the surface from drying out and looking tired. Metal bases mostly just need a damp cloth and a dry one after, though if you see any rust spots starting at the feet, deal with them early before they spread. These tables suit smaller kitchens and open plan living as well as they suit a proper dining room, the simple lines don't crowd a room the way a heavier traditional table does, which makes them good for apartments and starter homes where every inch of floor space matters, and they hold up fine in sunnier rooms too since most finishes are sealed against fading. When you're in the shop or the table's just been delivered, get down and check the legs meet the floor evenly with no wobble, run your fingers along the underside of the top for rough or unfinished edges, check that any extension leaf slides smoothly and locks properly, and look at how the top is attached to the base, screwed and adjustable is better than fixed, because floors are never quite as level as we'd like to think. Also check the metal welds at the joints, any bubbling or unevenness there usually means trouble within the first year of regular use.
Keep a soft cloth nearby for daily wipe downs and you'll keep the finish looking like new far longer than any sealant alone will manage.