Actually the Wallstreet 250(83 bus) and 292(83 bus) models had 1MB L2. the PDQ 266(66 bus) and 300(66 bus) had 1MB L2 as well. It was the 233(66bus) WallStreet that had no L2 and the 233(66bus) PDQ had 512KB L2.
WS came with 2GB HDD, PDQ came with 2, 4, 6.
Aside from that I dunno.. Rage LT vs Rage Pro LT?
Really, may as well go for 292 WallStreet over a 300Mhz PDQ because of the bus speed if you want the best of the best.