could well be common, as the 1.9 JTD for example is used by vauxhall as the "CDTi" and by saab as the "TiD" - both the same alfa / fiat engine with just a different plastic cover. Therefor a Vauxhall CDTi MAF must be the very same part since its on the same engine
Don't know if the TS MAF is different, I think they are the same though.
On the question of whether all MAFs are the same, they are at the end of the day, just an airflow measuring device, they dont affect or control what goes through them, just provide analog data from the mass of moving air, and most MAFs use hot-wire anemometer internals, and show the same values for the same air mass. The hwa MAF has a heated wire, it measures the cooling effect of the air moving over the wire and the ecu calculates the airspeed & mass from that.
A lot of VW owners have MAF problems and have successfully cleaned the wire element by spraying carb cleaner into it for a while. Worth a try before buying one. The hot wire gets crap building up on it, probably from sucking up other cars exhaust fumes in traffic, and gives a false reading cos its coated up, so it stays hotter, and reports less airflow than there is so the ecu reduces the fuelling.
Disconnecting it puts the ecu on maximum positive fuel trim as the resistance goes to infinity which pulls the ecu to the top its fuel trim table, making the car run very rich at low throttle openings but feeling much better than one thats running weak