Similar Micro 9, BUT . . . FN Reflex vs Springfield Hellcat

Which one (of these) would I choose? Springfield Armory Hellcat and the FN Reflex. Both are chambered in 9mm, have optic ready versions available, and the flush fit mag holds 10 or more rounds. They are about 1 inch wide and about 4 inches tall, barrels are 3.0 in vs 3.3 in. One is HAMMER fired and the other is STRIKER fired. (So does this mean Hammer vs Striker )