So I found my top speed to be comparable to my top speed on DBX lines, which is 105 BPM (210 BPM 16th notes).
Both of them start with DDU (which I consider the easiest for the lack of doubled upstrokes) and end with DUU (which I think is the hardest because… of course… doubled upstrokes). I think I did DUDD UDUU before DDUD UUDU on the guitar take, but reversed the order on the bass take. They feel like they could be more or less the same difficulty for me. DUUD UDDU was the penultimate in both, since I feel like it’s maybe a tad harder for me than the previous two. DUU on both are pretty fail, I think it caps out closer to 100 BPM. DDU I’ve done clean at 115 BPM, and wouldn’t be surprised if I could hit 120 BPM.
I’m thinking I’ll stick to the “middle 3” paradiddles to keep experimenting, as they seem to be more in line with my DBX speed, and maybe even the feel is comparable (maybe it forces the “helper” mechanic)?
It would be interesting to see if anyone else that plays DBX lines give these paradiddles a go to see if they have similar thoughts and results. Likewise, those that want to develop DBX might find this useful? Only way to find out is if more of y’all check it out!