Comparisons with the predecessor are inevitable, of course. Costlier? Without a doubt. Grander? Definitely so! Better? Hard to say, actually. The original has its crude charm, while this one is much more embellished.
Robotic Arnold Schwarzenegger has turned from bad to good in what was the most expensive movie ever at the time, and widely considered one of the best sequels ever. In my book of time-travel paradoxes.