Yes, you can create the table and then click on the Format button in the top right-hand corner of the keynote page. In the right sidebar, you have 4 tabs one of which says Cells. Click on the Cells tab and you can define the colors or styles of the lines in the table or select no lines between cells or rows of cells. See the table I created in Keynote below.
The name is relative and you can change it later. Just name the new drive new and use it for a week or day. Once you are ready to shift, name the old one "old" and put the name you want for new.
Or rename the old one before you introduce the new one.
This works out of the box, so I'm guessing you might have some other constraint that needs to be discussed, ...