For me I would take the Stubby 2 over a Chubby 1/2 but that's only because I think that I would find the handle of the Stubby more comfortable due to the bit of a bigger handle, and the indentation is in the middle on the Stubby, and I know now I don't need anything larger than a 24mm knot.
New brush I bought is only 23mm but does it ever have a monster bloom! Thankfully it isn't so much that I would want to part with it, but if it bloomed only a 1/4th of what this one did, no way could I handle it.
But this is just comparisons from looking at a Chubby and a Stubby. Might be different if I actually tried em. Really want to try a Simpsons T2 in 2-band. Sadly my million dollar check hasn't arrived in the mail yet. Maybe tomorrow.