No it's not a stupid question & no, it's not the same engine.
The 1200 engine in the B110 car & the B120 ute, from 1970 to 1973 was a development of the original A10 engine, basically with two extra main bearings, & more stroke to bring it up from 988cc to 1171cc.

For 1974 there were substantial changes to the design, although it still remained an A series engine. These changes included.

The alternator was repositioned from low on The left to high on the right to make room for an aircon compressor [when used]
The distributor was repositioned back where the 1200 fuel pump had been to make room for the alternator.
The fuel pump was positioned elsewhere on the block when the engine mount on the right was moved back 40mm
The engine mount on the left was moved back 40mm to balance things out & to provide more room for the aircon compressor.
The method of geting oil from the block into the head for rocker oiling was simplified.
The timing indicator markings were reversed meaning that the 1200 had a single indicator on the timing case & various marks on the pulley. The new engine had a single mark on the pulley & varoius graduations on the timing case.

Other than that, & some smog gear, it's the same engine, & both early & later types were, quite surprisingly, still designated as A12 engines by the factory.