I do not own a stopwatch, and do not have a utility to use. I suppose i could look for one, record each, and then time them. I will try to figure out how to edit Twitch TV recordings, and then splice the two putter uses into a single Youtube so they can be seen being used.
Using the clock in Win7, on the 15ft inc, the Rossa took just over 2 seconds to get to the Ding line, and the Versa L70 took nearly 3 seconds. I would guess the Versa takes about .4 to .7 seconds longer to travel the entire meter length.
I use the smallest increment possible, and even with a shorter throw the speed is obviously slower for the Versa. I was fine with the Rossa's speed.