I am vegetarian and my girlfriend is vegan our decisions are very conscious and calculated in this respect. I would probably class myself as a player, if forced to, in your above categorization as that is where I would feel the happiest/filthiest. I think the two are very different in as much as strong argument could shift my dietary ethics but would be unlikely to shake my sexual orientation. The only similarity I can see is that they can be practiced to varying degrees, I reckon you could probably see similarities with lots of different groups in this respect. Religions, sportsmen, music scensters..etc..
Know what I mean!?