Jbl Px300.4 amp vs PG Tantrum 600.4

Jbl Px300.4 (http://www.sounddomain.com/sku/JBLPX3004)

PG Tantrum 600.4 (http://www.sounddomain.com/sku/PHOT6004)

Which one??? Looking to run these on components looking mainly for SQ here

doubt you would be able to HEAR any differences ........ so it's mainly a question of power and features