No, the golf is much bigger than a Swift. Golf is bigger than the swift's so called elder brother, Baleno even. The current generation polo is indeed a tad bit bigger than the swift on dimensions. Your comparison is right.
Polo
+german build quality
+design
+features
+very few on road, unique ride
- bad resale value
- availability of spares
Swift RS
+japanese reliability
+cheap to maintain
+availability of spares
+good resale values
- low quality plastics and interiors
- not as well handling as a polo
zeristo's post in VW Polo vs Suzuki Swift was marked as the answer