puya quiz

Hi group, 

some time ago I have sown some puya seeds of two species P.venusta and P.chilensis.  However I messed up with the labelling and I am now unsure which is which.

I have attached jpg's of each one and I hope someone can ID them properly.  

The first one is somewhat faster grower , has more hooked teeth and is slighlty light green than the other

Thanks in advance

Peter