AKG k-240 MKII or K-271 MKII

[yourilevoye]

SO I was looking at these 2 headphones.
I could get:
K-240 MKII for 75 euro
K-271 MKII for 85 euro

The K-271 is closed back and the K-240 is semi-open.
What would be better for (non-competetive) gaming, music and movies?

 

[yourilevoye]

MERGED QUESTION
Question from yourilevoye : "Semi-open or closed back headphones?"

So I found 2 headphones that I like. 1 is semi-open and the other is closed.
I know the difference, but I am not sure which one I should get. The price of them are quite te same, so that does not matter.

My situation:
- I will use them (mostly) in my own room (alone).
- I like bass.
- I play a lot (mostly non competetive) games.
- I watch a lot Youtube.
- I do listen music the whole day while on my pc.
- I watch movies sometimes. Not that often.
- I do A LOT of voice chat.
- My inviroment is not really noisy the most of the time.
- I make a lot of homework at my pc.

The specific headphones I found:
closed; AKG k-271 MKII
Semi-open; AKG k-240 MKII