CREATE TABLE table_204_131 (id DECIMAL, "tops design code" TEXT, "electrical system" TEXT, "max speed" TEXT, "weight" TEXT, "brakes" TEXT, "route availability" DECIMAL, "notes" TEXT)

is 08-0av heavier than 08-0lx ?
SELECT (SELECT "weight" FROM table_204_131 WHERE "tops design code" = '08-0av') > (SELECT "weight" FROM table_204_131 WHERE "tops design code" = '08-0lx')
SELECT (SELECT "weight" FROM "table_204_131" WHERE "tops design code" = '08-0av') > (SELECT "weight" FROM "table_204_131" WHERE "tops design code" = '08-0lx')