Step 1 :Let's denote the regular price of the smartphone as \(P\), which is \$199.
Step 2 :The store is offering a 30% discount, so the sale price at the store would be \((1 - 0.3)P = 0.7P\).
Step 3 :John also has a coupon for an additional 10% off the sale price, so the final price he would pay at the store would be \((1 - 0.1)(0.7P) = 0.63P\).
Step 4 :Substituting \(P = 199\) into the equation, we get the final price at the store as \(0.63 \times 199 = \$125.37\).
Step 5 :The store's website is offering a 40% discount off the regular price, so the price on the website would be \((1 - 0.4)P = 0.6P\).
Step 6 :Substituting \(P = 199\) into the equation, we get the price on the website as \(0.6 \times 199 = \$119.40\).
Step 7 :Comparing the two prices, we find that \$119.40 (website) < \$125.37 (store).
Step 8 :\(\boxed{\text{Therefore, the true statement is 'John would pay less for the smartphone on the website.'}}\)