Could this be the sisters Margaret and ELizabeth in 1871? Ages arent brill, but as they are visitors the head might have onyl guessed! Age difference between them and place of birth are good.
1871 - Wales
RG10 5739 72 17
Holyrood House, Llandudno
Large h/h headed by William Smith, grocer, also there is hih sister in in law who is a lodging house keeper, then there are lots of visitors including:
Margaret Price 35 Independent lady bn Cheshire Disley
Elizabeth Price 28 " " "