you have more then enough power for either speaker. both are relatively efficient 90db, 91.5db. both seem to have similar specs but both dip to 3ohm load or slightly below but you have more then enough power for this load. so go for it see what sounds best to you.
your amps make 300w into a 4ohm load as your speakers are nominal 6-8 ohm dipping to 2.9 ohm and 3.2ohm your good to go.
so for future ref. the speakers sensitivity is an indication on how loud they will play with usually 1w at 1 meter (2.83v @ 1m is an indication they are rating the speaker at 8ohm load)
the Quads are not as efficient as the Focals but not that much, you probably wont notice the difference.
probably the most relevant info you need.
Quad: Sensitivity (2.83V @ 1m) 90dB ;
how much power you need for a given volume level, lower the number the more power you need generaly
Nominal impedance 6Ω
Minimum impedance 3.2Ω ;
this tells you how hard they are to drive higher is easier lower is harder. lower impedance will require an amp that can drive that load SS amps are better at low loads then tubes for example.
Frequency response (+/-3dB) 42Hz ~ 23kHz ;
how much of the frequency your speakers will perform in the average room. humans can hear from 20hz to 20khz (well only children and woman can hear that high but you get the idea)
Focal:
Sensitivity (2.83V / 1m)91.5dB
Nominal impedance 8 Ohms
Minimum impedance 2.9 Ohms
tweeterFrequency response (+/- 3dB)45Hz - 28kHz
other will most likely chime in and add or correct if I missed something