These are all just in my opinion. I can't compare to DL but I've put in if I know anything about the comparisons. I haven't included anything I know is closed.:
Disneyland Park
Space Mountain - completely different, well worth a go. Goes upside down if that bothers you.
Buzz - Same as Disneyland, wouldn't bother unless you really like it.
Autopia - Similar to the other rides of this type. Gets long lines.
Nautilus - Cute walk through attraction
Small World - similar but worth doing as it's been recently refurbed.
Peter Pan - Worth doing as it's also recently been refurbed. Get a Fastpass
Snow White - same as the one that closed elsewhere but in French.
Pinocchio - same as Snow
Dumbo - same as everywhere else
Carousel - same ride, differences in themeing.
Tea Cups - same ride but feels slower than other parks.
Alice's Labyrinth - Unique, well worth doing.
Le Pays des Contes de Fees - Same idea as Storybook at DL but different enough.
Casey Jnr - Like the ride in DL.
Princess Pavilion - Princess meet and greet. Currently one princess until 4pmish then another til 7.30ish. Long lines.
Meet Mickey - not a talking Mickey like Florida. Nice theater setting though. Long lines.
Pirates - Different and well worth doing.
Indiana Jones - good themeing, quick coaster. Wouldn't queue long but worth doing later in the day.
Adventure Isle/Family Robinson tree house - will just have reopened after a long refurb so well worth doing.
Phanton Manor - unique, well worth it.
Walt Disney Studios
Rock n Roller Coaster - same track as WDW. Better themed inside, much blander on the outside.
Armageddon - time in your life you'll never get back.
Lights, Motors Action - Pretty much the same as the one that closed in Florida
Tower of Terror - Same as California, but in French.
Art of Disney Animation - very similar to the one that closed in Florida.
Studio Tram Tour - cut down version of the one that was in Florida. In dire need of an update (or in my opinion, a wrecking ball).
Crush's Coaster - unique to Paris. Long lines, no Fastpass.
Ratatouille - unique to Paris. Long lines, has Fastpass. Do this ride.
RC Racer - not at DL or WDW, long lines, very short ride but great.
Parachutes - as per RC Racer, not as thrilling but very good fun.
Slinky Dog - not at DL or WDW, cute kid's ride.
Cars Quatre Roues Rallye - Similar to the new Mater ride at California adventure. Surprisingly fun.
Cinemagique - unique show, well worth it.
Mickey and the Magician - unique to Paris. Absolutely brilliant but very popular, get there early.
Flying Carpets - same as WDW.
Stitch Live - show for kids, similar to Turtle Talk.
Hope that helps.