I personally switched from Snort to Suricata for reasons mentioned here.
https://forum.netgate.com/topic/141946/to-snort-or-not-pfblocker/4
I didn't notice much difference in the GUI, configuration, or functionality aspect between the two. In terms of tuning rules, they seemed pretty much the same to me as well. In my opinion, once I figured out Snort the learning curve was not high for Suricata.