Pasting as an aliquote of the same sample or pasting as another sample is a huge difference. However, the two icons are very similar, only differing in a small "+" symbol. This is not ideal, becauase by accident it might be used the wrong one. Besides, hovering with the cursor show only "paste" on one option and "paste as new sample" on the other. The "paste" should be extended to "paste as aliquote of the same sample".
One Icon could be " + aliquot" and the other "+ new" or something similar.