Playing differant games on 360 and xb1 on the same account

If is under the same account it will won't be a problem.

Are you saying not much difference in bf4 360 and bf4 xb1?the difference is monumental!, There is a very good 360/xb1 comparrison video on IGN of AC4 graphics.

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Im 92% sync completion on ac4 on xb1,the detail,the textures,shading and polygons are so much better on xb1,and the sheer size of the game it runs completely smoothly, the game looks alive imo,stacks loads better than ac1 n 2, i played in the past, the MP
is pretty amazing too.

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Ive nt played it on the 360,but if ya only 10 mins in,without a doubt get it on xb1, for a game that is 900p the xb1 has dynamically made that irrelevant.

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After over 70 hours in story mode alone,I would do the game justice and enjoy it at its best on xb1.

It's not a question of different graphical settings, as others have stated, it's a completely different architecture. Also, I don't think 360 games will be using the same cloud services as XB1

Yes, you can even be using the same account on one xb1, and one xbox 360 at the same time. Or one at a time (but not two 360's, or 2 xb1's at once)

I have my 360 and my X1 playing on the same account at the same time playing different games.