Judging from the pictures on the homepage it looks pretty restricted on the intake. R4 has a bottom intake and uses the whole length of the front for side vents.
My guess is: No, won't match R4, probably not even close.
I should have said low cost alternative - half the price of the R4...
If you have low wattage components, i think it is a fine device. If you game, I would say it would get hot inside there. Would it get too hot? i duno. I think probably not. If you were worried, I would put fans on the top with an on/off switch. That way you can game and turn them on, or close the cover and have it silent.
Was thinking of only a basic setup, no gaming. It lacks some of the features of the R4 which I can understand.