Yeah. Personally from an art style, I prefer the OG nex.
634 is also nice because it is before the Chaos Elemental Graphical Rework (~636)
Unfortunately, 634 has the updated dragons from ~614. I prefer the reworked dragon models from around 2007ish. I just feel that aesthetically it kinda doesnt work with dragons in 634 revision since KBD still uses the old reworked model but the chromatic/metallic dragons were updated. (new KBD was ~730)