That is an interesting chart, IvanK, but a bit difficult to read as the time scale is logarithmic.

The tendency is that in terms of turn rates full circle both planes were quite close with perhaps a very small advantage for the spit (perhaps 2s as absolut max generously estimated optically. Would have to print it out and measure it to be more precise) at medium velocities. The spit will rule at slow speeds. For high velocities theres a minor advantage for the 109 in terms of turn rate.