Is it ok to be mad/sad because of this?

So I just got my Christmas gift. It is an iPhone 5C from my parents. I was very excited when I got it and gave them a huge hug. But the next day, I noticed that my sister got an iPhone 5S.Me and my sister are twins… Now I feel kinda mad/sad cuz that would mean my parents likes my sister more than me to buy a more expensive phone (with some cooler features).

Is this feeling ok to have? Or am I being ungrateful?

Added (1). My brother ( who is older than me) got an iPhone 5C as well.

My sister said she wanted a green 5C.

My dad in a computer engineer and researches electronics before buying them.

Don't worry I have felt just the same. I'm sure they don't love your sister more, they probably just didn't realize. I'm the oldest of two children and my younger sibling always used to get more expensive presents for him but it's not the price that counts, its the fact that they thought of you. If you are really bothered by this ask your parents about it.

You should be grateful for what you have. But I think it was inconsiderate of your parents to buy your sister a gift which is clearly more expensive and better. My parents always give me and brother gifts at the same time (I get presents on his birthday, vice versa) and they make sure not to give one of us something that is too expensive. And me and my brother are 2 years apart in age.

I'm sure she said she liked that one better and asked for that one.You're probably the only one thinking its a competition.

Ungrateful in my opinion, yes, kinda. But hear me out. I think fancy phones and other electonics r wastes of time and rot peoples brains. I use my phone only for communication with people far away when I really need it and sometimes to take an important picture or video. Right now, I'm using my tablet to answer your question. I admit, I use YouTube to watch fun videos and I play guitar hero but that's for very short amounts of time each.
Be happy u actually got it my phone is one of those free "upgrades" that barely have internet, no real games, nothing. Your parents don't love your twin more they probably wanted to get two different phones to avoid fighting and confusion b/c well, your twins.

Hmm maybe you should just ask him why he got her a better one and than see how you feel