Is your question about Suricata alerting or not with Snort 2 and 3 rules?
When using this HTTP packet for testing, I found that Snort3 can trigger the alert normally, but Snort2 cannot
Or, are you asking a question about Snort 2 vs Snort 3?
Snort questions are better addressed here: Snort Community & Blog Network - Snort.org