Yes, my experience with both is that they have the same systems depth.
The RJ may have EFIS, but don't let that fool you as there's no VNAV, only advisory VNAV (just like the real aircraft).
The RJ is much more hands-on than for example the 737NG.
Unlike the 146 it has autothrottle, but it won't select a thrust mode automatically like the 737NG would.
The procedures are old school just like with the 146 (lenghty procedures with loads of system tests).
So it's just a notch above a 146 with an EFIS retrofit.
If you want a more hands-on airplane with EFIS that still has a decent autopilot, the RJ is an excellent choice.
I prefer the RJ, but that's just my personal taste and not because the product is a better product than the 146.