Different or same cache for partitions?

[Stubi]

I have several partitions. I could create a cache for each of these partitions or I could assign all of the partitions to 1 and so the same cache only. Of course different partitions might have different cache requirements but in this case not.

If I have the same requirements (including the same settings for deferred writes) does it make any difference in respect of cache performance (the assumption is of course the cache is big enough not to create any bottleneck for any partition).

[Support]

If you're sure that cache space is enough and all partitions can share same settings, there's almost no performance difference on both layouts.