Honest question: Why do you feel the need to categorize your sexuality? I myself am 40 years old and still don't know which category I fit in. What need/itch do you fill by naming this part of your persona?
Actually not sure ay. I've been intimate with a big variety of people, but I still feel odd trying to label it. I definately lean closer to straight than anything else, but i dunno
Although I can see the uses in making up terms to define who you're attracted to, I dont like the idea of putting yourself in a box. Ive had straight friends get really confused when they find themselves attracted to the same sex, and gay friends get really confused when they find themselves attracted to the opposite sex. When you "join" a sexuality you dont sign a contract or anything.
A while ago I figured out I was bisexual. It was pretty great for a while, cause I was able to figure myself out and feel more free because of it. I didnt feel guilty for having certain thoughts. However, eventually I started to have some problems with the label itself. In this day and age, what even is a man or a woman? Ive found myself being attracted to people that dont identify as either gender. And isnt gender supposed to be a societal construct? In that case, why do we care so much about it in the case of define sexual identities?
Im no philosopher or social scientist, so I may just be talking out of my own ass here so forgive my ignorance. Nowadays whenever some asks me my sexuality (which by the way is a very weird thing to ask people you just met in real life) I always say "on a case by case basis".
Omnisexuality is defined as an attraction to persons of any gender identity (incl non-binary), but gender does still matter for an omnisexual (so in my case for example, I'm attracted to everyone, but more strongly towards men and less towards non-men). Bisexuals are attracted to men and women, but could also be attracted to non-binary people (but not necessarily I think).
So I'd say there's very little difference between them, if any. It's more of a vibe-based thing, whatever label you like the most.