I flew Cheyennes, 1900s and Brasilias, but only because I had to. It was valuable experience and gave me some perspective when transitioning into a jet, but it wasn't necessary.

Flying a prop vs a jet are two very different skill sets with their own challenges. No one is "better" than the other. Asking Dash-8 vs. CRJ is a loaded question. What do you want us to compare?

T-prop systems are a little more complex & more things break, you fly at the worst altitudes for weather, turbulence and icing, you generally fly into smaller airports that lack the modern equipment you find at the likes of ORD and LAX, and your schedules will be more tiresome because you have more legs scheduled per day.

Jets require you to really think ahead at all times, watch out for speed and altitude restrictions, plus you have complicated automation systems to manage, you run into the problems of high-atitude flight (coffin corner to explosive decompression to name 2), jet engines don't respond as quickly as a prop, and swept wings do not like to fly slow and are susceptible to dutch roll.

Don't forget to research the airlines and see if they are companies you'd want to work for (no regionals are "great" to work for, but some are better than others given your career goals)

For a "well-rounded" career where you experience everything, it might be better to start with a turboprop and then move onto a jet, but if you want to progress to a major as quickly as possible, it might be smarter to take the jet job. Of course this is a general guideline and varies for each major. Good luck!