Thanks in advance!

I MUCH prefer the first table set - Prettier contrast. Reason you want to change?

No, the second table does not work with your floor color. As @Diana Bier mentioned, keep the color of the first table, with the height of the second table.

Stain the new one to darker tone as your existing. Agree, table ht much preferred over pub ht, but the lighter/yellow tone is going to be a problem w/your red floors. A rug may help temporarily but is not the greatest under dining table imo. I'd add some upholstered host/hostess chairs to each end.

Keep looking that new one does noy work with your floors