You may want to ask on the houseplant forum. Are you able to take closer pics of the leaves?

My guess is warneckii and marginata, respectively

Maybe massangeana and marginata.

I have one looks like yours --its warneckii or lemon/lime draceana-- just bought it last week of course it is much smaller than yours it was on the sale table at Lowe's and was very very pot bound--so it has a new home in a larger pot and I hope he grows up to be as big as yours--thanks and good luck
Mari

The second plant is D. marginata..Green. It needs a little more light.

The first plant would be a true beauty with proper light, soil and watering. I never saw a Dracaena such as yours. It's quite unusual. Toni