I mean yeah they are different, but the synth is playing the same position in the song, It has the same general feeling, and yeah structure is pretty close to exact,
so in a nutshell,
No, this is basically different edits of the same song, or retakes, ect.
That's what most people will assume by default.
the first track lacks alot of things, it sounds squashed. maybe not go over the limiter so much?(which I assume is keeping this thing from cliping, just look at waveform.)
Also, the sidechaining is a good start, but it sounds cheesy with how exaggerated. you should be good on that if you set to -19.5 as threshold and 2.0 ratio, and screw with the release a little.
also, the sub bass thats playing, its nice and all.
But it doesn't ever turn off. and that equals ear fatigue, and not to mention it doesn't sound good after 2 mins straight.
Also, to put the nail in the coffin for me, you have a decent melody, but it repeats throughout the whole song, and same issue as the bass,
to simplify; more variation and try to not use it the entire track. overplaying the melody will make people bored as hell.
anyways man, I hope I was helpful and not too much of a dick, but to my ears and me, those are the major issues I see atm, there is probably more, but I'm not going give you the third degree.