If it says SFC- 2500ft, then that is what is encompasses. If you say 2500ft (in this example) doesn't include the restricted airspace it's sort of like saying working Monday to Friday doesn't include Friday 'cos it's "to" Friday. And what of the lower level (SFC) - are you able to fly around at surface level and not be in the restricted area? I think not.
AIP ENR 1.4 - 1.1.7
When ATS airspaces adjoin vertically (one above the other), flights at the common level must comply with the requirements of, and will be given services applicable to, the less restrictive class of airspace.
OK, if you get the lower level of services in these circumstance, are you not in that airspace and the differentiation is just that, the level of services? If being at the upper (common) level of the vertically adjoining airspace didn't have you in the lower one, then you would logically get the level of services applicable to the one you were in, i.e. the upper one. Note they refer to a "common" level, not immediately adjacent nor abutting levels.