Amateur? I can tell you that this is better than that. That eye is proof of it. And who said it had to capture the details of the reference? A reference can only guide you so far. The rest is all you. You can change it however you want.
... Honestly, I'm not sure if I made any sense there. I can barely understand it. But then again, it's really late, so I might just be tired.
Anyways, back to the point: good job, Marisa. That eye is phenomenal. I can't really give much feedback right now (duhhhh). Here's something to consider, though: pay attention to the size of the glasses. I remember constantly messing up when it came to drawing them on faces when doing so still interested me. Your glasses are more square-box shaped, whereas the reference's are horizontal rectangle-egg shaped.
Oh, and I love how just the smallest change in the eyes can give a completely different emotion.
*Losm rambles on about more nonsense until he falls asleep midsen - snore*