This, again, is a matter for you to decide, but there are definite differences besides the obvious ones.
For instance, the male cat is usually very cozy and friendly with his owner, while the female cat will be more cautious in approaching you and will want to make sure that what she's doing is safe and desirable. She will hesitate to make a sudden or a new move. A male cat will not hesitate to jump on your lap, but a female cat will first approach you cautiously. Once on your lap. she will need to make a number of small adjustments before she can relax.
Because female cats do have kittens, perhaps litter after litter, for which you will have to find good homes, you may want to consider having your cat spayed by your veterinarian. Veterinarians recommend spaying for most female cats because it makes them better pets for they no longer will go through periods of heat and pregnancy.
You may also want to consider "neutering" your male cat for if this operation is done while young, the male cat may not acquire what can be the very annoying habit of "spraying" or wetting all over the house with the resulting strong, offensive odor. Some non-neutered males, though, will not acquire this habit. If your cat is young and kept inside the house much of the time, he may have started the habit, but if it is not firmly acquired, neutering may cure him of it. Essentially a superficial operation, neutering will also keep your male cat at home more. He will not be out on the prowl for a girl friend.
If you are in doubt over your kitten's sex, you can use this easy formula: the male cat has two small dots like a colon mark (:) beneath his tail: the female cat has an upside-down exclamation point.
