Of the two, the larger scale fabric is the better but IMHO a better OBW fabric has some straigtlines as well as curves in the pattern. The fabrics you've chosen, though pretty, does not have enough deffinition. The motifs will all look too similar. With straight lines as well as curves in the pattern the motifs seem to come out as either circles (with the curved places in the pattern) or stars (with the straight places in the pattern.) I made a OBW with a Tiki (straight lines) /palm tree (curves) patterned fabric and opening each motif was a delight.. Each was different. Good luck.