They're really very different -- with very different origins and constraints. If you want to hear about my own experiences with bpftrace, I got into this a bit recently.[0] (And in fact, one of my questions about the article is how they deal with silently dropped data in eBPF -- which I found to be pretty maddening.)
[0] https://www.youtube.com/watch?v=mqvVmYhclAg#t=12m0s