The difference is subjective so it'll vary depending on who you're talking to, but when people say V/WN it probably means it's technically Xxxxxxx format (just like a VWN pet) but its name doesn't sound as nice as if it were VWN (so, Evera - VWN vs. Qahow - V/WN), or maybe it's just longer than a VWN name would be (Renia - VWN vs Eurileathie - V/WN)
