Olive oil is best, peanut oil and coconut oil aren't ideal but they'll do when olive doesn't fit the flavor profile. Butter is also ok.
Canola (or CANada Oil Low Acid) is a meme that you should never ingest; it's literally rapeseed oil that has been processed to shit.
"Vegetable" and soybean oil, along with margarine, fit firmly into the "kill it fire and magnets" tier.
I'd say it's a solid comparison. The flavor is close but still distinct, and gator can be used in any place chicken would be. Gator nuggets, baked gator sirloin, gator gumbo, gator stew, gator 'n dumplings, gator chili. I mean, I'm from central Florida, raised on the corner of bumfuck and "you shor got a purty mouth" so I've been eating it all my life. I know crocodile is pretty easy to get in Thailand and Vietnam, I honestly have no clue for Europe but google might have some answers.
I honestly try to avoid consuming traditional livestock, for health and ethical reasons, shit like gator, deer, wild boar, and elk are much healthier for you, often have a superior nutritional profile, are only marginally more expensive, and can often be hunted yourself.
I know Veeky Forums has a hard-on for chicken, but that's a filthy animal, and I strongly recommend researching into how those animals are kept and fed.
Fish and game: always a good decision.
Also, I've been shamelessly shilling lentils, but it's worth saying again: dirt cheap and ridiculously good for you.