The parent of my baby Agave does look like the photo of your Cream Spike Agave and it has some very serious spikes. The parent plant is about 10 inches in diameter.
Does anyone know what distinguishes Agave applanta Cream Spike from Agave potatorium Variegata/ Agave Kisho Kan? To confuse matters further, the Plant Delights website lists Cream Spike as formerly named Agave paryii (Avent).