Which bike frame has the measures more similar to the bike frame that I put before in 18" size?:
You can do some homework
and compare the geometry files of each bike.
Or use Sketchup for instance, to draw the frames, and superpose them to see the differences.
I quickly scanned this morning, both geometry Radon's and Carbonda's site( I'm not affiliated with them, just I like the quality of their products and they are my default go-to-shop for now ).
http://www.carbonda.com/mountain/mtb/97.htmlAnd except a 1° slacker angle of the seat tube, they were almost similar.
However you have a 17.5" and 19" on Carbonda's site, not 18", if I remember well.