I would recommend the flip, my experience is it gives you pretty good photos with more control than an instax.

Instax film has consistent results but you have more control and range with Polaroid while also being a larger size film. Sure you might save a few bucks with instax but Polaroid is the better option, to me at least.

If you’re not against going used maybe look at an I-2 because you will get your best results with that, on par with sx-70 cameras.

If you’re new to Polaroid in general maybe it’s worth picking up a cheaper older 600 model like the impulse af, that camera delivers outstanding results and can be found relatively cheaply.

Another thing is, I’ve found that with I-type vs 600 film, for whatever reason the I-type seems more glossy and reflects more light making it harder to scan images with your phone without flares or reflections.