STATISTICS IO の比較

前の2つの演習で示したサンプルクエリの STATISTICS IO 出力から、どのように結論づけられますか？

Example 1

Table 'Customers'. Scan count 1, logical reads 2, physical reads 0,....
Table 'Orders'. Scan count 2, logical reads 32, physical reads 0,...

Example 2

Table 'Customers'. Scan count 1, logical reads 2, physical reads 0,....
Table 'Orders'. Scan count 2, logical reads 16, physical reads 0,...