Having played both I’d say the 435 and 1025x necks feel a bit different, mostly in finish. They’re both satin necks but the newer ones are slightly more “aggressively” satin, if that makes any sense. I could feel the texture of the wood on the 435, whereas on my old 1025x the neck had less of that textured feeling - slicker to the touch. Both basses have satin finished necks but different degrees of satin I guess. I can’t say I necessarily prefer one over the other.
I definitely preferred the pickup selector switch of the older 1025x vs the blend knob Yamaha have gone for across the new range. So so easy to go between 3 distinct tones.