FTTC Huawei 128 vs Huawei 288 Backhaul Question

Hi,

Apart from the obvious port capacity, does the fibre feed's into both these types of FTTC cab remain the same? e.g. If the Huawei 288 can have 3 fibre lines going into it, would be Huawei 128 be limited to maybe 1 or 2 due to its size?

I suspect it would have less optical terminations but the actual fibre tubing would have the same capacity. So if bt wanted to change one for another it would not be an issue. However I would imagine they would just build another cab. The capacity per user is the same and easily expanded if required.