I have both, a 3" Red Latigo from SRD and an 1 1/2 Theirs paddle (I use for traveling).
It may be because I'm still a beginner but, I find I can keep my edges better on the Theirs even though it's much smaller. I suspect it's due to the fact it remains perfectly flat while stropping. Although I keep the hanging strop pretty taught.
I have noticed the 3" hanging slightly curls up on the sides (concave), this may be effecting my results.
Thoughts? Preferences?
Jon