ok here are a few quick answers
- no idea about boat weights. Assuming blade would be lighter. Hull is vector works hull. But boat is modified so its got viper everything expect the hulls.

- mainsails are the same
- spreaders are same angle
- diamonds same tension
- rotation and luff probably not same. left to the sailor to adjust
- yes main sheet have same purchase, not sure if both pulling as hard. I'm sure over the course we were testing on, there were adjustments that meant sometimes the viper had less tension and sometimes the blade had less tension. i mean, when one boat hit a wave first, they would adjust the sheets to compensate first right?

Anyway, was just a quick and fun test so please dont take it so seriously guys. will do more testing over the next few weekends and see what differences there are.