The designation of the letter indicates the size. 231 is Harbor of Refuge's #, where the "B" means that it is the large, or big size. The "S" designation would mean it is, of course, small, whereas a "MIN" refers to a miniature size, "F" refers to a lamp finial, "PC" refers to a fan pull chain, "PO" means it's an ornament, "M" is a magnet, and "LU" means it's a "light-up".
True, the detail of the Scaasis is nowhere near the intracacies of the Harbour Lights, especially when comparing the large pieces, but neither is the price. Collectors who purchase the Scaasis lighthouses aren't buying them as investments, hoping to sell them at a higher price when the lighthouse is retired. Scaasis collectors are usually just looking for momentos of lighthouses they have visited or grew up around. They find that they usually get decent quality for the price.
As many of the collectors here are not familiar with the Scaasis line, many Scaasis collectors are not familiar with Harbour Lights. Sometimes when we introduce our Scaasis customers to the Harbour Lights line, they are hooked by the quality and detail, especially on the larger size lighthouses. We also have numerous customers who purchase both Scaasis small and LLOM's, as there are many which one company makes that the other doesn't, or that HL has a LLOM version of a light which has been retired by Scaasis.