A laser diode (LD) end-pumped RTP electro-optic (E-O) Q-switched adhesive-free bond composite crystal laser TEM00 operating at repetition rate of 150 kHz is reported. Details are compared on performance of high repetition rates E-O Q-switched composite NdYVO4 and NdGdVO4 lasers. The experimental results reveal that under small and medium pump powers, the composite NdYVO4 crystal, compared with the composite NdGdVO4 crystal, has more capability to obtain higher peak power and shorter pulse width output through high repetition rates E-O Q-switched operation, for its larger stimulated emission cross-section and moderate upper-state lifetime. Compared with composite NdYVO4 crystal, composite NdGdVO4 crystal with excellent thermal performance under high pump power is more suitable to be the laser gain medium for high repetition rates E-O Q-switched operation.