I have a bilobata that has smaller leaves. I saw a nice full one at Lowes today that had much larger leaves than the one I have. Is it just the difference in age? I'm confused between bilobata, D70, and tsangii.

Bilobata (The one I found at Lowes was from Costa Farms. This is the description from their website.)

Hoya bilobata 'DS-70'

One of the smallest hoyas we grow, H. bilobata has little green leaves often flushed with red. This flowering houseplant has little clusters of reddish-purple flowers on and off throughout the year. Note: You'll sometimes also see it offered as Hoya 'Tsangii'.