The Spiritual Square focuses more on the aspects of Venus in your soul so maybe at the level of the chakras, planetary influences, etc. This may indirectly lead you toward being more attractive. But it is a focus on the soul, not precisely on divine beauty.
This yes, actually increases physical beauty. Again, if you'll be brought on the material plane to do something physical that enhances your appearance, go along with it.
You can:
I can't remember if it was HPS Lydia or another JG that said both square's will have a positive effect on one's physical body.
Can I do the 2 square's right after each other, or will I have to wait a period of time inbetween?
Am I allowed to use the same/similar visualisation's for both squares, albeit differing affirmation's?
Does it negatively affect the power if I read the mantra relatively quickly? Not ridiculously fast, but not too slow? It takes me around 25-30 secs to do 1 round of a full venus mantra.