DisBeamer: I've been on neither, if that helps
As an interesting sidenote, the Paris tower is the only one you can walk all the way around. It doesn't have a backstage side, so all sides of it are themed. (I noted when working Fantasmic! at MGM one night that the theming stops when it gets below the treeline that you can see from outside the park. Quite amused me the first time I was back there

)
Paris has had financial difficulties from the start, as we all know. Right now it's actually starting to recover, so I think we'll see some interesting developments in the near future at Disneyland Resort Paris. The studios does need some TLC, and the Toon Studios, tower and (to a point) the new Stitch Encounter that's coming soon (Think Turtle Talk with Crush, but with Stitch instead), it could be the sort of thing the studios needs. Until recently, there was actually very few attractions there, and compared to other parks, there still is.
Having said all that, I still believe that Disneyland Paris has the nicest Disneyland Park of them all, it's much prettier, has a more fairytale style castle. The only downside is the atmosphere created by the guests. This however has been talked about before in
other threads.
As for the "version" of the tower, from what I've heard/read, it's identical to DCA, however has French narration, and has most likely got slightly updated ride systems, since the Tower rides were designed to be upgradable, it may well be that the DCA version has the same version of the software on it, etc.
Andy.
Subsonic Radio Admin and former Walt Disney World Cast Member
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Disneyland Paris: 2001, 2004, 2007, 2010, 2012, 2014, 2016, 2017, 2018, 2019
Walt Disney World: 2006, 2010, 2011, 2015, 2019
Tokyo Disney Resort: 2013, 2014, 2016, 2017, 2018
Hong Kong Disneyland: 2016, 2017
Shanghai Disneyland: 2018