The USRA light 2-10-2 had 57" drivers and weighed 352,000 lbs (engine only). The USRA heavy 2-10-2 had 63" drivers and weighed 380,000 lbs. For my money, the "light" was the better looking locomotive; the "heavy" looked a bit top heavy. Although 40 years old, the Sunset engine remains a nicely executed model.
Was shocked to see that Pennsy had 130 USRA 2-10-2's. As always, Pennsy did things in a big way ! The remaining 45 USRA heavy 2-10-2's were assigned to the B&LE, C&S, CB&Q and the Erie.
