I just looked at their site. I find it ludicrous. The plant they have as Philodendron rugosum aberrant looks nothing like it. This it the real one. This form always has the weird 'notch's one side, theirs completely lacks that. Its being investigated right now whether rugosum aberrant form is actually a rugosum variant at all....the blooms between it and true rugosum and completely different, and the growth habit is also not the same.
Their separate listing for Tigertooth, Golden Girl, Double Edge Sword and Zig Zag are all the same plant...they are all the original Henderson's Pride that originated in Oz. Other names for this are Crocodile, Sawtooth, Pluto (a bronze form) and Ring of Fire (a variegated form). All the same plant.