Vascular plant's have a xylem and phloem that allows them to suck up water, and nonvacular plants don't which results in them being very short and found in water
Vascular plants is the phloem, (vessal) that transports food and the xylem transports water. Nomvascular plants are small with no vascular system. Which means non vascular plants do not have a phloem or a xylem.
Plant A would go through photosynthesis quicker than Plant B because it is essential for plants to receive a good amount of sunlight to create food (go through photosynthesis).