I can’t comment on the CRJ as I have no interest in that type of plane. But I can vouch for the WT CJ4 as being one of the best planes available for MSFS atm. Yeah, it’s a mod only, but what they’ve done to this aircraft is absolutely amazing. The stock one is “ho-hum” at best IMO. I wouldnt’ say terrible, but nothing outstanding. WT have elevated the CJ4 to perhaps not quite study level, but seriously close. The depth of the systems keeps it interesting, the avionics suite is top notch, and it’s just a joy to fly.
I’ve never really been a jet kind of guy, but this is the plane that won me over.