138 is Armin Van Buuren's hard trance label. As for the first one all of Ben Gold's remixes are amazing, but if you want more harder trance, look up older cosmic gate like exploration of space, the wave and fir wire. If you want something more modern sounding, try Mark Graham:
https://www.youtube.com/watch?v=yNH6h-nACwY

However the first track sound more like progressive, a couple of my favourite progressive trance ones are
https://www.youtube.com/watch?v=bUyZS2vNCX0

and

https://www.youtube.com/watch?v=J2SUICx3i1U

Probably what you're looking for is progressive, DI.fm has a channel for it

Oooh nice, thank you! ill check those out :D