Is the body of a KEO BLADE compatible with an KEO BLADE POWER spindle? Is the body of a X-TRACK compatible with a X-TRACK POWER?

Power and non-Power Blade and X-Track pedals are not cross compatible.  The Power axle has a larger diameter than the non-power version, so pedals of each series are different.   Non-power pedals cannot be “upgraded” or converted to power pedals. POWER pedals have bodies specifically designed for use with a power sensor.