BATTLE OF THE DUPES #2: Armani vs. What If?

I love the Armani Si eau de parfum and would constantly 'borrow' my sisters - I have never had the eau de parfum so constantly spray it when I am in the store because I love it so when a friend recommended a cheaper product that smelt very similar I decided to try it out.
Armani Si Eau De Parfum
Purchased from: FeelUnique
Size: 150ml
Price: £120.00

What If?
Purchased from: Essential Scent
Size: 55ml
Price: £4.00

Best packaging: Armani
Lasts longest: What If? (only slightly)
Cheapest: What If?

For 1ml of the Armani Si it costs £0.99 whereas 1ml of the What If? is £0.07 which is a big difference, now I do feel like What If? lasts slightly longer than the Armani but not by much and if you were to reapply it is still cheaper than having the Armani Si. I am not trying to bad mouth any products in any of these blog posts but I prefer the Armani Si packaging but I can't be putting that bottle in my everyday bag without worrying that it might break whereas I throw my What If? in my bag and don't worry, if it breaks it is only £4.00 but it is such sturdy packaging. I have repurchased the What If?, the Armani is actually my sisters, I own the Armani Si Eau De Toilette which has a slightly different scent. I will purchase both of them but the Armani would be a treat and more decoration on my vanity whereas the What If? would be my everyday - ride or die. There is a slight difference in the scent but only slightly.

Is it a dupe: DEFINITELY (in capital letters), already been told off by my sister for pinching her but with great pleasure I can say it's a £4 versions