可以使用StructType的“toDDL()”方法将StructType转换为DDL格式字符串，然后通过比较DDL字符串之间的差异来比较两个StructType之间的不同。 这里是一个简单的示例：

from pyspark.sql.types import StructType, StructField, StringType, IntegerType

# 创建两个StructType
schema1 = StructType([
    StructField("id", IntegerType()),
    StructField("name", StringType())
])

schema2 = StructType([
    StructField("id", IntegerType()),
    StructField("name", StringType()),
    StructField("age", IntegerType())
])

# 转换为DDL字符串
ddl1 = schema1.toDDL()
ddl2 = schema2.toDDL()

# 比较两个DDL字符串
if ddl1 == ddl2:
    print("The two schemas are the same.")
else:
    print("The two schemas are different.")

输出：The two schemas are different.