While it's certainly a lite version, Journey has platforming, puzzle solving, item collection, and enemy avoidance.. basically everything a Mario game does. Except it's got a style/spirit/flare that no other game of the Mario genre has. Not to mention the insanely unique co-op. Though I'd probably put Rayman Origins above Mario or Journey when it comes to pure platforming in recent years.
If platforming, puzzle solving, item collection and enemy avoidance are the makings of a Mario game then I guess the Uncharted series has been doing a surprisingly stellar job of being Mario games as well. There's some odd angles coming into play here, a few elements seen in platformers being in Journey = A Mario game? that's almost like saying Banjo Tooie has the makings of a great Call of Duty game because there's an FPS multiplayer mode in there, the same game spends most of the time jumping around a 3D environment collecting items, maybe Journey is a Banjo game as well.
Platformers aren't just defined by how Mario does it and how Mario does its platforming is still vastly different to Journey which should come across as pretty obvious i'd think.
Rayman is closer to the Mario style, even then you know i'd call it a Rayman game and not a Mario game, there's a platformer sub genre they both occupy at least, I don't think Journey shares in it, it's very much its own beast entirely.
If Journey is a "Mario game" then well, it's pretty damn awful at it, likewise NSMBU makes for a pretty poor Journey.
Mario has always been one of the perfect sandboxes for play. Nintendo has increasingly confusticated the series' ludic principles, adding task-oriented complexity instead of allowing for the game's skill-ceiling to organically cater to the most creative and talented players. It'd be like football consisting of nothing but juggling exercises and passing drills. It's a linear (and I find tedious) diversion from a pure, joyful game. I've noticed the NSMB2 DLC is particularly guilty of this. While not facilitating that high-level play, Journey similarly encapsulates the joy of jumping and flying, of movement, that I haven't experienced in a Mario game since SMG2.
Well this shows if anything that we play those games for different reasons, Mario to me encapsulates the idea of being presented with a series of levels to overcome, filled with enemy and environmental hostility and layouts that push the players use of core platforming mechanics in various ways, throw in power ups and other variables to change the way you can tackle a stage entirely and a replay can come out completely differently.
I could draw a few similarities to Journey here beyond the whole "run and jump" aspect but in the end I really don't feel that the two play much alike at all making comparisons completely wishy washy, almost like it's boiling down to some way of delivering a "take that" to people who would call Journey a non game by drawing up similarities to a series renowned mostly for its pure gameplay approach.
Journey does capture the joy of simple movement in a 3D space i'll agree on that much, i'm sure that's also one of the main plus points people like to give SM64 but that's not what i'd define an entire series by, especially one that's spent far more entries as both linear and being in 2D, wouldn't it make more sense to say it's the best 3D platformer you've played in years?
Alternatively you completely lost me with whatever you're saying up there.