Curse you, all feed! Now I have this in my head.
But, since I now did have it in my head, there's some likely answers that my poor, abused brain generated.
It would likely be very yifferent. Not so much the mechanics if you have a penis, and not at all if you don't since manual stimulation would remain the same as long a a vagina exists. However, if there is no clitoris, or an equivalent, then oral changes immensely.
But, let's stick with anatomical parity for this. We assume a vagina, a clitoris, and labia, all equally sensitive on average with a human. This isn't actually a guarantee, since the clitoris isn't present on all animals, nor do labia work exactly the same . But without this assumption, there's too many variables.
However, body chemistry being what it is, you're probably going to have a different taste when eating pussy pussy, since you picked a feline-like species.
Normal temperatures for cats, including big cats, runs higher than human norms. Only a couple of degrees, but that's enough that your pitiful human phallus would be able to detect it as extra warm.
Most cats do self lubricate when in heat, so if you're braving your cat queen during that, expect a wet and slippery experience. But, outside of season, lubrication is minimal, so it would be a rougher ride for all parties involved. That's assuming the cat people follow cat-like cycles. If they're more human, no reason self lubrication couldn't occur all year round.
Internal texture would be different, and there would likely be less space when the vagina is in a typical state, as cats tend to be on the narrow side in their genitals compared to their body size (yay for having had cats need veterinary attention after giving birth, I guess). So it would likely be a high pressure, high heat environment. If you are an unusually endowed human man, you might not even be able to achieve penetration, but if you did, it would feel very different from a human.
Cleanup would be no big deal for you. The cat woman is just going to lick her fur clean. Seriously, cats do just that after mating, no reason your anthro-cat wouldn't. Otherwise, it still shouldn't be any worse than that time you jerked it to your pet cat and got some on its fur.
Sorry, no slapping dat azz. Fur would prevent that kind of sound. Though, if she got enough booty, you might still get clapped back.
As far as having your dick sucked, have you ever seen photos of a cat tongue under magnification? If not, I strongly encourage you to look it up before you shove your cock in cat lady's mouth. Teeth aren't the only issue. Just saying, I've had cats over the years, and they'll sometimes bathe hands. While it isn't painful on a hand, it is very rough, and a penis is more sensitive by a lot. If you have a clitoris of your own, chances are that it's even more sensitive than a penis, so tread carefully.
I can't fucking believe I answered this.