What would be the sensor on the Scott i have ?, would that be torque ?.I would recommend the Tongsheng TSDZ2 48V 250W kit which is the nearest to what you currently ride (Scott Eride 920).
The TSDZ2 has torque sensor, is smaller and lighter than the cadence sensored BBS01B.
If thats the case I think that would be best sticking to what feels right. TBH its a field im totally clueless about. Cadence i might not get on with as im not a great peddler, I prefer to do a few revolutions to get up to speed, cruise in freewheel and then a bit more peddling to maintain speed and momentum.