one of the best places to start if you're comparing Canon cameras from the film era especially is the Canon Camera Museum...
Search Canon's cameras by product series and release period.
global.canon
but, pretty much as
@Phil V said - the more digits in the name, the more "consumer" it is
EOS 3000n is also under the name Rebel XSn or EOS 66 depending on the sales market
EOS 1000 again can be found under Rebel S
I'm quite a keen EOS Film Body user, but I remember handling a couple of the "Rebel" range probably back around 20 years ago and decided right then that I'd no intention of ever bothering with them.
My Advice - Canon EOS-30 film camera is probably the last of the Canon Film Cameras I'd buy - but i'd be on the look out for either an EOS-3 or EOS-1V if I was in the market for a "EF Film Camera body" (I'm not BTW, i've actually got all three of the bodies mentioned in this sentence...

)
ETA: as I've got first hand experience of the 3 film bodies above, i'll offer a pretty clear "equivalence" to the digital cameras - EOS-30 is pretty much a full-frame (cos it's filllum) version of a EOS 450D - handles very similarly, same size, and weight, balances with lenses in a similar way, just cane handle EF-S lenses. It's also got a neat trick of the "eye controlled focus point selection" that was copied from the EOS-3. The EOS-1v - well - what can I say - it's the workhorse, the pro film body of choice - so check that it's not been "thrashed" by someone working the cruise ships, shooting 750 frames a night, 6 nights a week for 4 years. Even if it has, it'll probably be ok, but eventually the shutter mech will let go. Other than that, only drawback is it's expensive. Middle ground is the EOS-3, i'd like to compare it to something like the first generation EOS-5d really, but with the eye-focus control built in. Remarkably bullet proof for a "resin" rather than "magnesium" body. And, it'll stand up to pro shooting. I had a pair of them when I was working cruise ships, bought from new, never missed a beat, one got sold, and the good one went back into my collection. It's kind of my go-to if I'm honest - put it this way, when I had my FINAL EVER roll of Kodachrome, I put it through the EOS-3 rather than the 1v. Not because the 3 is better, but because I was just 100% totally comfortable with everything the camera did or could do, and I KNEW that i'd get my 36+ exposures on the "last one in my lifetime" Kodachrome.