Which feels better?

Neither. Manual simulation feels best for me. I can't always orgasm from oral (mental block) and strictly penetration doesn't get me off. I need some external friction. Groin rubbing, thrust bumping, fingers rubbing the clit.

A very large number of women can not get off from either strictly oral or penetrative sex. They need external stimuli to get off. That's normal. Much like there are men who can't get off from blow job's. Everyone is different.

We can't answer anything for your partner. Only she will know what she likes, and you should be asking her what she wants during the sexy times.
 
It so much depends on so many variables hunni, what works best for your partner won't necessarily work for others. We're all unique, experimenting and learning each others bodies is all part of the fun of a personal sexual relationship.
 
They both feel wonderful to me.. a g spot orgasm is deep deep inside .. feels like an itch that’s finally getting scratched in such a delicious way..
Clitoral orgasm is easier for me .. and is great too..