Great question! Unfortunately, you'll get all sorts of opinions.
Here's mine... in a word, yes.
First I think there is some importance in distinguishing a C4... there are two varying front suspensions... '84 through '87 and '88 through '96. Within those will be further arguments. Putting those aside...
Its not so much that a C4 is 'all that', but I think its reasonable to consider that there's ~15 years of technology difference (willfully acknowledging that technology is not always advancement).
In summary, the S30's front suspension is high on kingpin & scrub, low on caster, with no appreciable ackerman, and coupled with high unsprung weight. Thats not an insult... just contrary to modern beliefs.
There are a few members here that will argue either side with more savvy than I, but the point remains... The C4 front suspension leans more in the direction of improvement than not.